A part of the last logs:
[2018-06-09 17:27:11.487175] skip package 'plesk-management-node-17.8.11-debian9.0.build1708180301.19.amd64' from component panel - same or newer version of this package is already installed (in system plesk-management-node-17.8.11-debian9.0.build1708180301.19.amd64)
[2018-06-09 17:27:11.487346] skip package 'plesk-platform-runtime-1.0.2-debian.9.180209.1429.amd64' from component panel - same or newer version of this package is already installed (in system plesk-platform-runtime-1.0.2-debian.9.180209.1429.amd64)
[2018-06-09 17:27:11.487516] skip package 'plesk-release-17.8.11-debian9.0.build1708180301.19.amd64' from component panel - same or newer version of this package is already installed (in system plesk-release-17.8.11-debian9.0.build1708180301.19.amd64)
[2018-06-09 17:27:11.487687] skip package 'plesk-repair-kit-17.8.11-debian9.0.build1708180516.08.all' from component panel - same or newer version of this package is already installed (in system plesk-repair-kit-17.8.11-debian9.0.build1708180516.08.all)
[2018-06-09 17:27:11.487859] skip package 'plesk-service-node-utilities-17.8.11-debian9.0.build1708180515.21.amd64' from component panel - same or newer version of this package is already installed (in system plesk-service-node-utilities-17.8.11-debian9.0.build1708180515.21.amd64)
[2018-06-09 17:27:11.488028] skip package 'plesk-skins-17.8.11-debian9.0.build1708180516.15.all' from component panel - same or newer version of this package is already installed (in system plesk-skins-17.8.11-debian9.0.build1708180516.15.all)
[2018-06-09 17:27:11.488199] skip package 'plesk-web-hosting-17.8.11-debian9.0.build1708180301.19.amd64' from component panel - same or newer version of this package is already installed (in system plesk-web-hosting-17.8.11-debian9.0.build1708180301.19.amd64)
[2018-06-09 17:27:11.488384] skip package 'plesk-wp-upgrade-1.0-71.17091512.all' from component panel - same or newer version of this package is already installed (in system plesk-wp-upgrade-1.0-71.17091512.all)
[2018-06-09 17:27:11.488559] skip package 'psa-17.8.11-debian9.0.build1708180301.19.amd64' from component panel - same or newer version of this package is already installed (in system psa-17.8.11-debian9.0.build1708180301.19.amd64)
[2018-06-09 17:27:11.488730] skip package 'psa-autoinstaller-3.22.11-debian.9.180221.1553.amd64' from component panel - same or newer version of this package is already installed (in system psa-autoinstaller-3.22.11-debian.9.180221.1553.amd64)
[2018-06-09 17:27:11.488899] skip package 'psa-libxml-proxy-2.9.7-debian9.0.18021314.amd64' from component panel - same or newer version of this package is already installed (in system psa-libxml-proxy-2.9.7-debian9.0.18021314.amd64)
[2018-06-09 17:27:11.489135] skip package 'psa-logrotate-3.8.2-debian9.0.build1708171004.18.amd64' from component panel - same or newer version of this package is already installed (in system psa-logrotate-3.8.2-debian9.0.build1708171004.18.amd64)
[2018-06-09 17:27:11.489310] skip package 'psa-phpmyadmin-4.7.8-debian9.0.build1708180222.15.all' from component panel - same or newer version of this package is already installed (in system psa-phpmyadmin-4.7.8-debian9.0.build1708180222.15.all)
[2018-06-09 17:27:11.489479] skip package 'psa-pylibplesk-17.8.11-debian9.0.build1708180301.19.amd64' from component panel - same or newer version of this package is already installed (in system psa-pylibplesk-17.8.11-debian9.0.build1708180301.19.amd64)
[2018-06-09 17:27:11.489710] skip package 'psa-updates-17.8.11-debian9.0.build1708180326.12.all' from component panel - same or newer version of this package is already installed (in system psa-updates-17.8.11-debian9.0.build1708180326.12.all)
[2018-06-09 17:27:11.489901] skip package 'psa-vhost-17.8.11-debian9.0.build1708180425.13.all' from component panel - same or newer version of this package is already installed (in system psa-vhost-17.8.11-debian9.0.build1708180425.13.all)
[2018-06-09 17:27:11.489981] skip package 'sw-collectd-5.5.0.1-debian9.0.18011511.amd64' from component panel - same or newer version of this package is already installed (in system sw-collectd-5.5.0.1-debian9.0.18011511.amd64)
[2018-06-09 17:27:11.490056] skip package 'sw-cp-server-2.5.1-debian9.0.18012916.amd64' from component panel - same or newer version of this package is already installed (in system sw-cp-server-2.5.1-debian9.0.18012916.amd64)
[2018-06-09 17:27:11.490131] skip package 'sw-engine-2.24.9-debian.9.180409.1642.amd64' from component panel - same or newer version of this package is already installed (in system sw-engine-2.24.9-debian.9.180409.1642.amd64)
[2018-06-09 17:27:11.490207] skip package 'sw-librrd-1.6.0.1-debian9.0.18011511.amd64' from component panel - same or newer version of this package is already installed (in system sw-librrd-1.6.0.1-debian9.0.18011511.amd64)
[2018-06-09 17:27:11.490282] skip package 'sw-rrdtool-1.6.0.1-debian9.0.18011511.amd64' from component panel - same or newer version of this package is already installed (in system sw-rrdtool-1.6.0.1-debian9.0.18011511.amd64)
[2018-06-09 17:27:11.490392] skip keypackage 'plesk-core-17.8.11-debian9.0.build1708180301.19.amd64' from component panel - same or newer version of this package is already installed (in system plesk-core-17.8.11-debian9.0.build1708180301.19.amd64)
[2018-06-09 17:27:11.490506] skip keypackage 'psa-17.8.11-debian9.0.build1708180301.19.amd64' from component panel - same or newer version of this package is already installed (in system psa-17.8.11-debian9.0.build1708180301.19.amd64)
[2018-06-09 17:27:11.490617] skip keypackage 'plesk-web-hosting-17.8.11-debian9.0.build1708180301.19.amd64' from component panel - same or newer version of this package is already installed (in system plesk-web-hosting-17.8.11-debian9.0.build1708180301.19.amd64)
[2018-06-09 17:27:11.490689] Following packages will be installed: psa-locale-base-en-us-17.8.11-debian9.0.build1708180531.10.all
[2018-06-09 17:27:11.490721] ----------------
[2018-06-09 17:27:11.490887] Auflösung der Paketabhängigkeiten wird geprüft.
[2018-06-09 17:27:11.490948] autoinstaller: read output of DEBIAN_FRONTEND=noninteractive LANG=C apt-get --assume-yes --show-upgraded --purge --no-reinstall -o APT::Get::List-Cleanup=true -o Dpkg:

ptions::=--force-confdef -o Dpkg:

ptions::=--force-confold -o APT::Get::AllowUnauthenticated=false -o Acquire::Retries=3 -t 'stretch*' --just-print install psa-locale-base-en-us=17.8.11-debian9.0.build1708180531.10
[2018-06-09 17:27:11.984370] E: Version '17.8.11-debian9.0.build1708180531.10' for 'psa-locale-base-en-us' was not found
---X--- `apt-get` output ---------------------
Reading package lists...
Building dependency tree...
Reading state information...
---------------------- `apt-get` output ---X---
[2018-06-09 17:27:11.985491] Fehlerdetails werden in der Protokolldatei gespeichert...
Sources list:
Installed in system packages:
Error: Installation wird nicht fortgesetzt
Die Ausführung von apg-get ist mit folgender Meldung fehlgeschlagen:
Reading package lists...
Building dependency tree...
Reading state information..