Hi as i can not post answers i opened an new threat.
The only blue button I see is the "Search thread" button. No reply button visible - as you can see on the screenshot: https://ralf-kerkhoff-bilderwelten.de/uploaded/forum/forum.png
Cheers Ralf
Weird, you are definately in a forum group that is allowed to reply. Thanks for letting us know. The forum migration went too well to be true apparently…
@Ralf Please try again
Now it works :-)