Warning! The subscription is temporarily unavailable [SOLVED]
SOLVED (thx to Hetzner Support and Plesk Forum Member Juan-CarlosB)
1. connect to server via ssh root
2. run command:
/usr/local/psa/bin/domain --on yourmaindomain.com
3.Wait OS reply:
SUCCESS: Changing status of domain...
OS: Debian 6, LAMP. Plesk Subscribtion via Hetzner.
Update went smoothly (from 11.0.9 to 11.5.30) 2 days ago.
Right after finalization of update - i logined in and got notification - "Эта подписка временно недоступна, так как находится в процессе резервного копирования или восстановления"...