dpkg: error processing package postfix (--configure)

When I try install postfix I'm receiving following error: root@myvps:~# apt install postfix Reading package lists... Done Building dependency tree Reading state information... Done The following additional packages will be installed: postfix-sqlite Suggested packages: postfix-mysql postfix-pgsql postfix-ldap postfix-pcre postfix-lmdb sasl2-bin dovecot-common resolvconf postfix-cdb ufw postfix-doc The following NEW packages will be installed: postfix postfix-sqlite 0 upgraded, 2 newly installed, 0 to remove and 0 not upgraded. Need to get 0 B/1,755 kB of archives. After this operation, 4,378 kB of additional disk space will be used. Do you want to continue? [Y/n] Y Preconfiguring packages ... Selecting previously unselected package postfix-sqlite. (Reading database ... 66632 files and directories currently installed.) Preparing to unpack .../postfix-sqlite_3.1.8-0+deb9u1_amd64.deb ... Unpacking postfix-sqlite (3.1.8-0+deb9u1) ... Selecting previously unselected package postfix. Preparing to unpack .../postfix_3.1.8-0+deb9u1_amd64.deb ... Unpacking postfix (3.1.8-0+deb9u1) ... Processing triggers for systemd (232-25+deb9u2) ... Processing triggers for man-db (2.7.6.1-2) ... Setting up postfix-sqlite (3.1.8-0+deb9u1) ... grep: /etc/postfix/dynamicmaps.cf: No such file or directory Adding sqlite map entry to /etc/postfix/dynamicmaps.cf Processing triggers for rsyslog (8.24.0-1) ... Setting up postfix (3.1.8-0+deb9u1) ... Created symlink /etc/systemd/system/multi-user.target.wants/postfix.service → /lib/systemd/system/postfix.service. Adding group `postdrop' (GID 118) ... Done. setting myhostname: myvps setting alias maps setting alias database setting myorigin setting destinations: $myhostname, example.com, myvps, localhost.localdomain, localhost setting relayhost: setting mynetworks: 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 setting mailbox_command setting mailbox_size_limit: 0 setting recipient_delimiter: + setting inet_interfaces: all setting inet_protocols: all Postfix (main.cf) is now set up with a default configuration. If you need to make changes, edit /etc/postfix/main.cf (and others) as needed. To view Postfix configuration values, see postconf(1). After modifying main.cf, be sure to run 'service postfix reload'. Running newaliases newaliases: fatal: scan_dir_push: open directory /etc/postfix/dynamicmaps.cf.d: Permission denied dpkg: error processing package postfix (--configure): subprocess installed post-installation script returned error exit status 75 Processing triggers for systemd (232-25+deb9u2) ... Processing triggers for rsyslog (8.24.0-1) ... Errors were encountered while processing: postfix needrestart is being skipped since dpkg has failed E: Sub-process /usr/bin/dpkg returned an error code (1) Why dpkg fails when I try install postfix? The output of ls -ld /etc/postfix/dynamicmaps.cf.d: ls: cannot access '/etc/postfix/dynamicmaps.cf.d': No such file or directory