webapp Http Error 400 after updating

Hello
I just updated my UBUNTU 14.04 Server to newest Kopano 8.5
Now webapp is not reachable. I get HTTP error 400 Bad Request

Kopano server is running .
During update I saw no errors…

Any help / Idea

Thanks bskoeln

In apache2 error log i get

rejected insecure request as configuration for insecure cookies is false…

bskoeln

Sorry …my mistake…
I didnt use HTTPS…
funny result

bskoeln