Try to mount SMB share on NAS and get "Operation not supported"

I have several Synology NAS, running DSM 6.2.2-24922 Update 5, which I successfully mount on Ubuntu 18.04 with: sudo mount -t cifs //192.168.x.y/folder_name -o username=user,password=???????,uid=1000,sec=ntlm,vers=1.0 /local_mount_point I have bought a new one, which is running DSM 6.2.4-25556. I attempt to mount in the same way and I get this error: mount: /local_mount_point: mount(2) system call failed: Operation not supported. EDIT I removed the vers=1.0, and the error changed to //192.168.x.y/folder_name does not exist Enable SMB Share is enabled on the new NAS, with the same settings as the others. My smb.conf on the new NAS is: [global] printcap name=cups winbind enum groups=yes include=/var/tmp/nginx/smb.netbios.aliases.conf min protocol=SMB2 security=user local master=no realm=* passdb backend=smbpasswd printing=cups max protocol=SMB3 winbind enum users=yes load printers=yes workgroup=WORKGROUP And my smb.share.conf is: [folder_name] recycle bin admin only=yes ftp disable modify=no ftp disable download=no write list=nobody,nobody browseable=yes mediaindex=no hide unreadable=no win share=yes enable recycle bin=yes invalid users=nobody,nobody read list=nobody,nobody ftp disable list=no edit synoacl=yes valid users=nobody,nobody writeable=yes guest ok=yes path=/volume2/folder_name_1 skip smb perm=yes comment="" [folder_name_2] recycle bin admin only=yes ftp disable modify=no ftp disable download=no write list=nobody,nobody browseable=yes mediaindex=no hide unreadable=no win share=yes enable recycle bin=yes invalid users=nobody,nobody read list=nobody,nobody ftp disable list=no edit synoacl=yes valid users=nobody,nobody writeable=yes guest ok=yes path=/volume1/folder_name_2 skip smb perm=yes comment="" (For interest, the smb.conf on one of the NAS which are working is: [global] printcap name=cups winbind enum groups=yes include=/var/tmp/nginx/smb.netbios.aliases.conf security=user local master=no realm=* passdb backend=smbpasswd printing=cups max protocol=SMB2 winbind enum users=yes load printers=yes workgroup=WORKGROUP ) Can anyone advise?