it could be a theme or plugin issue
Themes
As a test switch to a default theme such as twentytwenty, and see if this fixes.
Plugins
If that doesn’t work, also deactivate all plugins apart from bbpress and style pack and see if this fixes. if it does, re-enable one at a time to see which is causing the error.
If you cannot do this to your site (say because it is live) then use the ‘troubleshooting’ features of this plugin to let you test without affecting other users
https://en-gb.ww.wp.xz.cn/plugins/health-check/
Then come back
I’ll also add to everything that @robin-w just mentioned –
Another user recently posted this issue, and it was due to his browser cache. Once he cleared his cache, the proper editor box then showed. Same could be true for any WP site caching plugins and/or any CDN cache.
@realityhousedev – It’s been about a week, so I’m assuming that you got this straight after trying our suggestions. Marking as resolved, but feel free to post here again if you tried all of that and still have issues with the right editor being displayed.