I’m facing the same problem. The plugin seems to install fine, but no tab or settings option appears.
My webhost made another try. In his older version of WP it went fine. But in my WP4, he said it shows a message about “invalid header”. He questioned the compatibility of the plugin with WP4. I’m using Highwind theme.
Any clues about the cause of this problem?
Facing same issue on my site. I’ve tried searching and but that resulted in no answers.
Also, going to mysite.com/forums takes me to one of the pre-set (from the theme) topics and not the homepage. Going to mysite.com/forums.olddomain.net takes me to the homepage.
Deactivated my All in One SEO plugin and it appeared. Weird.
bbPress is tested with wordpress default themes. It maybe a conflict – you need to check plugins and themes
It could be a theme or plugin issue
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.
If plugins don’t pinpoint the problem, as a test switch to a default theme such as twentytwelve, and see if this fixes.