nibos wrote: I have installed the LimeSurvey Version 2.05+ Build 140404 and I want to update via comfort
You installed 2.05+ new? Or you have this 2.05+ since years and want to update now?
Since non of the themes or workarounds work in newer versions, the safest approach is to install a new LS version (Version 3.X) manually and then move your surveys to the new installation.
Only LS3 is in support. So older versions are no longer supported.
The Comfortupdate showing 500 might have a temporary glitch. But upgrading an LS 2.05+ from 2014 via Comfortupdate will not be without glitches when you have modified themes and workarounds.
So don't upgrade that way, if you have running surveys or will start surveys soon.