[johnhiler]

There was the exact same error messages reported here:

https://bbpress.org/forums/topic/admin-panel-warning

Here was the solution:

It turned out that couple of topics in the topic tables didnt have topic start time.

It was 0000-00-00 00:00:00. It was probably from converting from phpBB.

I changed to start times and then there is no warnings anymore.

Do you have phpmyadmin? You could check the topic start times in the database maybe…