Hi,
bbPress doesn’t have a role called ‘Forum Administrator’; it has a role called the ‘Keymaster.’ Also, bbPress has its own roles system, so if you don’t see these roles, you most likely have some other plugin or code that changes/removes them for whatever reason. My plugin shows the roles that the bbPress Core function lists, so it can’t do anything about it, if that function returns nothing.
Try to troubleshoot which plugin or code snippet is doing that by finding the conflicting code.
To confirm which plugin or theme is causing conflict, here is the article about testing for conflicts: https://support.dev4press.com/kb/article/testing-for-conflicts/.
And check for errors too. To get the PHP error log, check out this article: https://support.dev4press.com/kb/article/get-php-errors-from-the-server/. Or, you can configure WordPress to log errors: https://support.dev4press.com/kb/article/enable-wordpress-debug-mode/.
Regards,
Milan