When i try to backup remote server with rsnapshot it errors out with 255 code

Every time I try running sudo rsnapshot -v alpha I get this type of error(it errors for every backup entry I have):

ERROR: /usr/bin/rsync returned 255 while processing root@151.131.222.222:/etc/
    /usr/bin/rsync -a --delete --numeric-ids --relative --delete-excluded \
        --rsh=/usr/bin/ssh -i /home/user/ssh/id_ed25519 \
        root@151.131.222.222:/usr/share/ \
        /var/cache/rsnapshot/alpha.0/server_backup/

1. Yes, rsync installed on the server and this machine 2. Yes, rsync works if I try to manually copy some files with these root credentials from the remote 3. There is one thing that can be potentially it. When I tried to run the errored out command it demanded quotes around arguments for the rsh. Otherwise it would throw syntax error. But I am not sure how to forse rsnapshot to do that. And if I run the errored out command with quotes around the rsh key it will error with 255 code as well. 4. Firewall does not block ssh. 5. Server allows only public key authentication 6. I host my ubuntu server on Vultr Here is my rsnapshot.conf file

#################################################
    # rsnapshot.conf - rsnapshot configuration file #
    #################################################
    #                                               #
    # PLEASE BE AWARE OF THE FOLLOWING RULE:        #
    #                                               #
    # This file requires tabs between elements      #
    #                                               #
    #################################################

    #######################
    # CONFIG FILE VERSION #
    #######################

    config_version	1.2

    ###########################
    # SNAPSHOT ROOT DIRECTORY #
    ###########################

    # All snapshots will be stored under this root directory.
    #
    snapshot_root	/var/cache/rsnapshot/

    # If no_create_root is enabled, rsnapshot will not automatically create the
    # snapshot_root directory. This is particularly useful if you are backing
    # up to removable media, such as a FireWire or USB drive.
    #
    #no_create_root	1

    #################################
    # EXTERNAL PROGRAM DEPENDENCIES #
    #################################

    # LINUX USERS:   Be sure to uncomment "cmd_cp". This gives you extra features.
    # EVERYONE ELSE: Leave "cmd_cp" commented out for compatibility.
    #
    # See the README file or the man page for more details.
    #
    cmd_cp		/bin/cp

    # uncomment this to use the rm program instead of the built-in perl routine.
    #
    cmd_rm		/bin/rm

    # rsync must be enabled for anything to work. This is the only command that
    # must be enabled.
    #
    cmd_rsync	/usr/bin/rsync

    # Uncomment this to enable remote ssh backups over rsync.
    #
    cmd_ssh	/usr/bin/ssh

    # Comment this out to disable syslog support.
    #
    cmd_logger	/usr/bin/logger

    # Uncomment this to specify the path to "du" for disk usage checks.
    # If you have an older version of "du", you may also want to check the
    # "du_args" parameter below.
    #
    #cmd_du		/usr/bin/du

    # Uncomment this to specify the path to rsnapshot-diff.
    #
    #cmd_rsnapshot_diff	/usr/bin/rsnapshot-diff

    # Specify the path to a script (and any optional arguments) to run right
    # before rsnapshot syncs files
    #
    #cmd_preexec	/path/to/preexec/script

    # Specify the path to a script (and any optional arguments) to run right
    # after rsnapshot syncs files
    #
    #cmd_postexec	/path/to/postexec/script

    # Paths to lvcreate, lvremove, mount and umount commands, for use with
    # Linux LVMs.
    #
    #linux_lvm_cmd_lvcreate	/sbin/lvcreate
    #linux_lvm_cmd_lvremove	/sbin/lvremove
    #linux_lvm_cmd_mount	/bin/mount
    #linux_lvm_cmd_umount	/bin/umount

    #########################################
    #     BACKUP LEVELS / INTERVALS         #
    # Must be unique and in ascending order #
    # e.g. alpha, beta, gamma, etc.         #
    #########################################

    retain	alpha	6
    retain	beta	7
    retain	gamma	4
    #retain	delta	3

    ############################################
    #              GLOBAL OPTIONS              #
    # All are optional, with sensible defaults #
    ############################################

    # Verbose level, 1 through 5.
    # 1     Quiet           Print fatal errors only
    # 2     Default         Print errors and warnings only
    # 3     Verbose         Show equivalent shell commands being executed
    # 4     Extra Verbose   Show extra verbose information
    # 5     Debug mode      Everything
    #
    verbose		2

    # Same as "verbose" above, but controls the amount of data sent to the
    # logfile, if one is being used. The default is 3.
    # If you want the rsync output, you have to set it to 4
    #
    loglevel	3

    # If you enable this, data will be written to the file you specify. The
    # amount of data written is controlled by the "loglevel" parameter.
    #
    logfile	/var/log/rsnapshot.log

    # If enabled, rsnapshot will write a lockfile to prevent two instances
    # from running simultaneously (and messing up the snapshot_root).
    # If you enable this, make sure the lockfile directory is not world
    # writable. Otherwise anyone can prevent the program from running.
    #
    lockfile	/var/run/rsnapshot.pid

    # By default, rsnapshot check lockfile, check if PID is running
    # and if not, consider lockfile as stale, then start
    # Enabling this stop rsnapshot if PID in lockfile is not running
    #
    #stop_on_stale_lockfile		0

    # Default rsync args. All rsync commands have at least these options set.
    #
    #rsync_short_args	-a
    #rsync_long_args	--delete --numeric-ids --relative --delete-excluded

    # ssh has no args passed by default, but you can specify some here.
    #
    ssh_args	-i /home/user/ssh/id_ed25519

    # Default arguments for the "du" program (for disk space reporting).
    # The GNU version of "du" is preferred. See the man page for more details.
    # If your version of "du" doesn't support the -h flag, try -k flag instead.
    #
    #du_args	-csh

    # If this is enabled, rsync won't span filesystem partitions within a
    # backup point. This essentially passes the -x option to rsync.
    # The default is 0 (off).
    #
    #one_fs		0

    # The include and exclude parameters, if enabled, simply get passed directly
    # to rsync. If you have multiple include/exclude patterns, put each one on a
    # separate line. Please look up the --include and --exclude options in the
    # rsync man page for more details on how to specify file name patterns.
    #
    #include	???
    #include	???
    #exclude	???
    #exclude	???

    # The include_file and exclude_file parameters, if enabled, simply get
    # passed directly to rsync. Please look up the --include-from and
    # --exclude-from options in the rsync man page for more details.
    #
    #include_file	/path/to/include/file
    #exclude_file	/path/to/exclude/file

    # If your version of rsync supports --link-dest, consider enabling this.
    # This is the best way to support special files (FIFOs, etc) cross-platform.
    # The default is 0 (off).
    #
    #link_dest	0

    # When sync_first is enabled, it changes the default behaviour of rsnapshot.
    # Normally, when rsnapshot is called with its lowest interval
    # (i.e.: "rsnapshot alpha"), it will sync files AND rotate the lowest
    # intervals. With sync_first enabled, "rsnapshot sync" handles the file sync,
    # and all interval calls simply rotate files. See the man page for more
    # details. The default is 0 (off).
    #
    #sync_first	0

    # If enabled, rsnapshot will move the oldest directory for each interval
    # to [interval_name].delete, then it will remove the lockfile and delete
    # that directory just before it exits. The default is 0 (off).
    #
    #use_lazy_deletes	0

    # Number of rsync re-tries. If you experience any network problems or
    # network card issues that tend to cause ssh to fail with errors like
    # "Corrupted MAC on input", for example, set this to a non-zero value
    # to have the rsync operation re-tried.
    #
    #rsync_numtries 0

    # LVM parameters. Used to backup with creating lvm snapshot before backup
    # and removing it after. This should ensure consistency of data in some special
    # cases
    #
    # LVM snapshot(s) size (lvcreate --size option).
    #
    #linux_lvm_snapshotsize	100M

    # Name to be used when creating the LVM logical volume snapshot(s).
    #
    #linux_lvm_snapshotname	rsnapshot

    # Path to the LVM Volume Groups.
    #
    #linux_lvm_vgpath	/dev

    # Mount point to use to temporarily mount the snapshot(s).
    #
    #linux_lvm_mountpath	/path/to/mount/lvm/snapshot/during/backup

    ###############################
    ### BACKUP POINTS / SCRIPTS ###
    ###############################

    # REMOTE SERVER
    backup	root@151.131.222.222:/home/	server_backup/
    backup	root@151.131.222.222:/etc/	server_backup/

    #backup_script	/usr/local/bin/backup_pgsql.sh	localhost/postgres/
    # You must set linux_lvm_* parameters below before using lvm snapshots
    #backup	lvm://vg0/xen-home/	lvm-vg0/xen-home/

    # EXAMPLE.COM
    #backup_exec	/bin/date "+ backup of example.com started at %c"
    #backup	root@example.com:/home/	example.com/	+rsync_long_args=--bwlimit=16,exclude=core
    #backup	root@example.com:/etc/	example.com/	exclude=mtab,exclude=core
    #backup_exec	ssh root@example.com "mysqldump -A > /var/db/dump/mysql.sql"
    #backup	root@example.com:/var/db/dump/	example.com/
    #backup_exec	/bin/date "+ backup of example.com ended at %c"

    # CVS.SOURCEFORGE.NET
    #backup_script	/usr/local/bin/backup_rsnapshot_cvsroot.sh	rsnapshot.cvs.sourceforge.net/

    # RSYNC.SAMBA.ORG
    #backup	rsync://rsync.samba.org/r	syncftp/	rsync.samba.org/rsyncftp/

My sshd logs look this way:

2025-01-21T16:47:06.445342+00:00 server sshd: Connection from 99.11.11.11 port 57908 on 151.131.222.222 port 22 rdomain ""
2025-01-21T16:47:06.445890+00:00 server sshd: debug1: Local version string SSH-2.0-OpenSSH_9.7p1 Ubuntu-7ubuntu4
2025-01-21T16:47:06.446150+00:00 server sshd: debug1: Remote protocol version 2.0, remote software version OpenSSH_8.9p1 Ubuntu-3ubuntu0.10
2025-01-21T16:47:06.446387+00:00 server sshd: debug1: compat_banner: match: OpenSSH_8.9p1 Ubuntu-3ubuntu0.10 pat OpenSSH* compat 0x04000000
2025-01-21T16:47:06.448025+00:00 server sshd: debug1: permanently_set_uid: 109/65534 [preauth]
2025-01-21T16:47:06.448401+00:00 server sshd: debug1: list_hostkey_types: rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256,ssh-ed25519 [preauth]
2025-01-21T16:47:06.448865+00:00 server sshd: debug1: SSH2_MSG_KEXINIT sent [preauth]
2025-01-21T16:47:06.473088+00:00 server sshd: debug1: SSH2_MSG_KEXINIT received [preauth]
2025-01-21T16:47:06.473305+00:00 server sshd: debug1: kex: algorithm: curve25519-sha256 [preauth]
2025-01-21T16:47:06.473602+00:00 server sshd: debug1: kex: host key algorithm: ssh-ed25519 [preauth]
2025-01-21T16:47:06.473829+00:00 server sshd: debug1: kex: client->server cipher: chacha20-poly1305@openssh.com MAC:  compression: none [preauth]
2025-01-21T16:47:06.474193+00:00 server sshd: debug1: kex: server->client cipher: chacha20-poly1305@openssh.com MAC:  compression: none [preauth]
2025-01-21T16:47:06.474496+00:00 server sshd: debug1: expecting SSH2_MSG_KEX_ECDH_INIT [preauth]
2025-01-21T16:47:06.502026+00:00 server sshd: debug1: SSH2_MSG_KEX_ECDH_INIT received [preauth]
2025-01-21T16:47:06.509345+00:00 server sshd: debug1: ssh_packet_send2_wrapped: resetting send seqnr 3 [preauth]
2025-01-21T16:47:06.509768+00:00 server sshd: debug1: rekey out after 134217728 blocks [preauth]
2025-01-21T16:47:06.510085+00:00 server sshd: debug1: SSH2_MSG_NEWKEYS sent [preauth]
2025-01-21T16:47:06.510210+00:00 server sshd: debug1: Sending SSH2_MSG_EXT_INFO [preauth]
2025-01-21T16:47:06.510573+00:00 server sshd: debug1: expecting SSH2_MSG_NEWKEYS [preauth]
2025-01-21T16:47:06.543286+00:00 server sshd: debug1: ssh_packet_read_poll2: resetting read seqnr 3 [preauth]
2025-01-21T16:47:06.543606+00:00 server sshd: debug1: SSH2_MSG_NEWKEYS received [preauth]
2025-01-21T16:47:06.543946+00:00 server sshd: debug1: rekey in after 134217728 blocks [preauth]
2025-01-21T16:47:06.544260+00:00 server sshd: debug1: KEX done [preauth]
2025-01-21T16:47:06.636933+00:00 server sshd: debug1: userauth-request for user root service ssh-connection method none [preauth]
2025-01-21T16:47:06.637064+00:00 server sshd: debug1: attempt 0 failures 0 [preauth]
2025-01-21T16:47:06.638069+00:00 server sshd: debug1: PAM: initializing for "root"
2025-01-21T16:47:06.641531+00:00 server sshd: debug1: PAM: setting PAM_RHOST to "99.11.11.11"
2025-01-21T16:47:06.642045+00:00 server sshd: debug1: PAM: setting PAM_TTY to "ssh"
2025-01-21T16:47:06.664190+00:00 server sshd: Connection closed by authenticating user root 99.11.11.11 port 57908 [preauth]
2025-01-21T16:47:06.665162+00:00 server sshd: debug1: do_cleanup [preauth]
2025-01-21T16:47:06.666011+00:00 server sshd: debug1: monitor_read_log: child log fd closed
2025-01-21T16:47:06.666354+00:00 server sshd: debug1: do_cleanup
2025-01-21T16:47:06.666609+00:00 server sshd: debug1: PAM: cleanup
2025-01-21T16:47:06.667644+00:00 server sshd: debug1: Killing privsep child 2070
2025-01-21T16:47:06.668031+00:00 server sshd: debug1: audit_event: unhandled event 12

My iptables rules look like this:

Chain INPUT (policy DROP)
target     prot opt source               destination         
ufw-before-logging-input  all  --  anywhere             anywhere            
ufw-before-input  all  --  anywhere             anywhere            
ufw-after-input  all  --  anywhere             anywhere            
ufw-after-logging-input  all  --  anywhere             anywhere            
ufw-reject-input  all  --  anywhere             anywhere            
ufw-track-input  all  --  anywhere             anywhere            

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination         
ufw-before-logging-forward  all  --  anywhere             anywhere            
ufw-before-forward  all  --  anywhere             anywhere            
ufw-after-forward  all  --  anywhere             anywhere            
ufw-after-logging-forward  all  --  anywhere             anywhere            
ufw-reject-forward  all  --  anywhere             anywhere            
ufw-track-forward  all  --  anywhere             anywhere            

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination         
ufw-before-logging-output  all  --  anywhere             anywhere            
ufw-before-output  all  --  anywhere             anywhere            
ufw-after-output  all  --  anywhere             anywhere            
ufw-after-logging-output  all  --  anywhere             anywhere            
ufw-reject-output  all  --  anywhere             anywhere            
ufw-track-output  all  --  anywhere             anywhere            

Chain ufw-after-forward (1 references)
target     prot opt source               destination         

Chain ufw-after-input (1 references)
target     prot opt source               destination         
ufw-skip-to-policy-input  udp  --  anywhere             anywhere             udp dpt:netbios-ns
ufw-skip-to-policy-input  udp  --  anywhere             anywhere             udp dpt:netbios-dgm
ufw-skip-to-policy-input  tcp  --  anywhere             anywhere             tcp dpt:netbios-ssn
ufw-skip-to-policy-input  tcp  --  anywhere             anywhere             tcp dpt:microsoft-ds
ufw-skip-to-policy-input  udp  --  anywhere             anywhere             udp dpt:bootps
ufw-skip-to-policy-input  udp  --  anywhere             anywhere             udp dpt:bootpc
ufw-skip-to-policy-input  all  --  anywhere             anywhere             ADDRTYPE match dst-type BROADCAST

Chain ufw-after-logging-forward (1 references)
target     prot opt source               destination         

Chain ufw-after-logging-input (1 references)
target     prot opt source               destination         
LOG        all  --  anywhere             anywhere             limit: avg 3/min burst 10 LOG level warn prefix "[UFW BLOCK] "

Chain ufw-after-logging-output (1 references)
target     prot opt source               destination         

Chain ufw-after-output (1 references)
target     prot opt source               destination         

Chain ufw-before-forward (1 references)
target     prot opt source               destination         
ACCEPT     all  --  anywhere             anywhere             ctstate RELATED,ESTABLISHED
ACCEPT     icmp --  anywhere             anywhere             icmp destination-unreachable
ACCEPT     icmp --  anywhere             anywhere             icmp time-exceeded
ACCEPT     icmp --  anywhere             anywhere             icmp parameter-problem
ACCEPT     icmp --  anywhere             anywhere             icmp echo-request
ufw-user-forward  all  --  anywhere             anywhere            

Chain ufw-before-input (1 references)
target     prot opt source               destination         
ACCEPT     all  --  anywhere             anywhere            
ACCEPT     all  --  anywhere             anywhere             ctstate RELATED,ESTABLISHED
ufw-logging-deny  all  --  anywhere             anywhere             ctstate INVALID
DROP       all  --  anywhere             anywhere             ctstate INVALID
ACCEPT     icmp --  anywhere             anywhere             icmp destination-unreachable
ACCEPT     icmp --  anywhere             anywhere             icmp time-exceeded
ACCEPT     icmp --  anywhere             anywhere             icmp parameter-problem
ACCEPT     icmp --  anywhere             anywhere             icmp echo-request
ACCEPT     udp  --  anywhere             anywhere             udp spt:bootps dpt:bootpc
ufw-not-local  all  --  anywhere             anywhere            
ACCEPT     udp  --  anywhere             mdns.mcast.net       udp dpt:mdns
ACCEPT     udp  --  anywhere             239.200.200.200      udp dpt:1900
ufw-user-input  all  --  anywhere             anywhere            

Chain ufw-before-logging-forward (1 references)
target     prot opt source               destination         

Chain ufw-before-logging-input (1 references)
target     prot opt source               destination         

Chain ufw-before-logging-output (1 references)
target     prot opt source               destination         

Chain ufw-before-output (1 references)
target     prot opt source               destination         
ACCEPT     all  --  anywhere             anywhere            
ACCEPT     all  --  anywhere             anywhere             ctstate RELATED,ESTABLISHED
ufw-user-output  all  --  anywhere             anywhere            

Chain ufw-logging-allow (0 references)
target     prot opt source               destination         
LOG        all  --  anywhere             anywhere             limit: avg 3/min burst 10 LOG level warn prefix "[UFW ALLOW] "

Chain ufw-logging-deny (2 references)
target     prot opt source               destination         
RETURN     all  --  anywhere             anywhere             ctstate INVALID limit: avg 3/min burst 10
LOG        all  --  anywhere             anywhere             limit: avg 3/min burst 10 LOG level warn prefix "[UFW BLOCK] "

Chain ufw-not-local (1 references)
target     prot opt source               destination         
RETURN     all  --  anywhere             anywhere             ADDRTYPE match dst-type LOCAL
RETURN     all  --  anywhere             anywhere             ADDRTYPE match dst-type MULTICAST
RETURN     all  --  anywhere             anywhere             ADDRTYPE match dst-type BROADCAST
ufw-logging-deny  all  --  anywhere             anywhere             limit: avg 3/min burst 10
DROP       all  --  anywhere             anywhere            

Chain ufw-reject-forward (1 references)
target     prot opt source               destination         

Chain ufw-reject-input (1 references)
target     prot opt source               destination         

Chain ufw-reject-output (1 references)
target     prot opt source               destination         

Chain ufw-skip-to-policy-forward (0 references)
target     prot opt source               destination         
ACCEPT     all  --  anywhere             anywhere            

Chain ufw-skip-to-policy-input (7 references)
target     prot opt source               destination         
DROP       all  --  anywhere             anywhere            

Chain ufw-skip-to-policy-output (0 references)
target     prot opt source               destination         
ACCEPT     all  --  anywhere             anywhere            

Chain ufw-track-forward (1 references)
target     prot opt source               destination         
ACCEPT     tcp  --  anywhere             anywhere             ctstate NEW
ACCEPT     udp  --  anywhere             anywhere             ctstate NEW

Chain ufw-track-input (1 references)
target     prot opt source               destination         

Chain ufw-track-output (1 references)
target     prot opt source               destination         
ACCEPT     tcp  --  anywhere             anywhere             ctstate NEW
ACCEPT     udp  --  anywhere             anywhere             ctstate NEW

Chain ufw-user-forward (1 references)
target     prot opt source               destination         

Chain ufw-user-input (1 references)
target     prot opt source               destination         
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:ssh
ACCEPT     udp  --  anywhere             anywhere             udp dpt:openvpn
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:ssh /* 'dapp_OpenSSH' */
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:https
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:http
ACCEPT     udp  --  anywhere             dns.google           udp dpt:domain
ACCEPT     tcp  --  anywhere             dns.google           tcp dpt:domain

Chain ufw-user-limit (0 references)
target     prot opt source               destination         
LOG        all  --  anywhere             anywhere             limit: avg 3/min burst 5 LOG level warn prefix "[UFW LIMIT BLOCK] "
REJECT     all  --  anywhere             anywhere             reject-with icmp-port-unreachable

Chain ufw-user-limit-accept (0 references)
target     prot opt source               destination         
ACCEPT     all  --  anywhere             anywhere            

Chain ufw-user-logging-forward (0 references)
target     prot opt source               destination         

Chain ufw-user-logging-input (0 references)
target     prot opt source               destination         

Chain ufw-user-logging-output (0 references)
target     prot opt source               destination         

Chain ufw-user-output (1 references)
target     prot opt source               destination

My sshd_config file:

PermitRootLogin yes


# This is the sshd server system-wide configuration file.  See
# sshd_config(5) for more information.

# This sshd was compiled with PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games

# The strategy used for options in the default sshd_config shipped with
# OpenSSH is to specify options with their default value where
# possible, but leave them commented.  Uncommented options override the
# default value.

# Include /etc/ssh/sshd_config.d/*.conf

# When systemd socket activation is used (the default), the socket
# configuration must be re-generated after changing Port, AddressFamily, or
# ListenAddress.
#
# For changes to take effect, run:
#
#   systemctl daemon-reload
#   systemctl restart ssh.socket
#
#Port 22
#AddressFamily any
#ListenAddress 0.0.0.0
#ListenAddress ::

#HostKey /etc/ssh/ssh_host_rsa_key
#HostKey /etc/ssh/ssh_host_ecdsa_key
#HostKey /etc/ssh/ssh_host_ed25519_key

# Ciphers and keying
#RekeyLimit default none

# Logging
#SyslogFacility AUTH
LogLevel DEBUG

# Authentication:

#LoginGraceTime 2m
#PermitRootLogin prohibit-password
#StrictModes yes
#MaxAuthTries 6
#MaxSessions 10

PubkeyAuthentication yes

# Expect .ssh/authorized_keys2 to be disregarded by default in future.
#AuthorizedKeysFile	.ssh/authorized_keys .ssh/authorized_keys2

#AuthorizedPrincipalsFile none

#AuthorizedKeysCommand none
#AuthorizedKeysCommandUser nobody

# For this to work you will also need host keys in /etc/ssh/ssh_known_hosts
#HostbasedAuthentication no
# Change to yes if you don't trust ~/.ssh/known_hosts for
# HostbasedAuthentication
#IgnoreUserKnownHosts no
# Don't read the user's ~/.rhosts and ~/.shosts files
#IgnoreRhosts yes

# To disable tunneled clear text passwords, change to no here!
PasswordAuthentication no
#PermitEmptyPasswords no

# Change to yes to enable challenge-response passwords (beware issues with
# some PAM modules and threads)
KbdInteractiveAuthentication no

# Kerberos options
#KerberosAuthentication no
#KerberosOrLocalPasswd yes
#KerberosTicketCleanup yes
#KerberosGetAFSToken no

# GSSAPI options
#GSSAPIAuthentication no
#GSSAPICleanupCredentials yes
#GSSAPIStrictAcceptorCheck yes
#GSSAPIKeyExchange no

# Set this to 'yes' to enable PAM authentication, account processing,
# and session processing. If this is enabled, PAM authentication will
# be allowed through the KbdInteractiveAuthentication and
# PasswordAuthentication.  Depending on your PAM configuration,
# PAM authentication via KbdInteractiveAuthentication may bypass
# the setting of "PermitRootLogin prohibit-password".
# If you just want the PAM account and session checks to run without
# PAM authentication, then enable this but set PasswordAuthentication
# and KbdInteractiveAuthentication to 'no'.
UsePAM yes

#AllowAgentForwarding yes
#AllowTcpForwarding yes
#GatewayPorts no
X11Forwarding yes
#X11DisplayOffset 10
#X11UseLocalhost yes
#PermitTTY yes
PrintMotd no
#PrintLastLog yes
#TCPKeepAlive yes
#PermitUserEnvironment no
#Compression delayed
#ClientAliveInterval 0
#ClientAliveCountMax 3
#UseDNS no
#PidFile /run/sshd.pid
#MaxStartups 10:30:100
#PermitTunnel no
#ChrootDirectory none
#VersionAddendum none

# no default banner path
#Banner none

# Allow client to pass locale environment variables
AcceptEnv LANG LC_*

# override default of no subsystems
Subsystem sftp	/usr/lib/openssh/sftp-server

# Example of overriding settings on a per-user basis
#Match User anoncvs
#	X11Forwarding no
#	AllowTcpForwarding no
#	PermitTTY no
#	ForceCommand cvs server

Thank you for your attention, hopefully someone can help me solve this. I spent the whole day on this issue. If you think I can use another tool for the backups, please let me know. I am new to system administrating so will gladly appreciate any help!