V.8.5.5 : Community integration doesn't work


Today I have performed fresh, clean install of C5 v8.5.5.
Everything works fine except community integration.
I have logged in to c5 community from my dashboard - and after that I have noticed iframe (100%/100px) with my own dashboard login screen.

When I returned to "extend concrete5" section - I still have CTA button : "connect to c5 community" - but in my profile I can see multiple entities for this project.

How to check why my C5 instance is not able to connect to community server?

I have reviewed server ewrrorlog - but there is nothing related to c5...

ANy ideas or anybody had similar issues ?

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jagd replied on at Permalink Reply
Ok - solved.
It looks like Chrome had some issue with this operation - even without silly tracking-blockers had some issue. On FF works fine - so it was browser / client - side problem.