[@robin-w Moderator 7 years, 12 months ago]

It could be a theme or plugin issue issue, so you’ll need to test to find out which

Themes

As a test switch to a default theme such as twentyfifteen, and see if this fixes.

Plugins

Deactivate all but bbpress and see if this fixes. if it does, re-enable one at a time to see which is causing the error.

Then come back