I'm sorry to say a bug crept in in version 2.59.0, where a missing database field UniqueNotification.hash can't be found. This problem is fixed in 2.59.1.
Thanks Olle for this solution. Only problem that I now have is that the system says there is a new security update available but when i use ComfortUpdate it gives the error that it didn't find a build-version. How can i solve this. Thank you for the help!
Here's a patch that lets you manually update from 2.59.0 to 2.59.1. It might be necessary to apply if you have problems. Just extract it in your root folder.
NOTE: THIS PATCH WILL ONLY WORK FROM VERSION 2.59.0 TO 2.59.1.
No, the clean install of the limesurvey container (while keeping the database container) lead to the problem. In my previous docker image (with 252+20160920) everything was fine.