Sorted – The front end issue is a CSS error made by us.
The back end issue is a problem with DiviAI and not caused by BBPress itself.
The temp fix is to disable DiviAI from the Divi>Role Editor for all users including the admin.
I have raised this issue with Divi asking for a fix in Divi5 when it gets released.
TO fix this on the back end we disabled DiviAI which has a compatibility issue
On the front end the submit button on replies remains greyed out.
So users cannot reply to topics.
We have tried disabling all plugins – This appears to be a divi compatibility problem
