Just chiming in here for the record. My knowledge of code and plugins is novice at best and I’m afraid I will not be of any help.
I received these 404 errors with a fresh install of bbPress a little over a week ago. My membership plugin, Digital Access Pass, kept tripping it up. The DAP support team did some testing and could not come up with a solution for me. They suggested I use the fix from https://bbpress.org/forums/topic/fix-404-issue-for-bbpress-2-2-x/ until something else could be figured out.
I’m no expert, so take this for what it’s worth and research further …
Here’s the code I found that seems to work. Have not fully tested. Would appreciate any feedback from someone with more experience.
Find bbp_the_content( array( ‘context’ => ‘reply’ … and change line to
` ‘reply’, ‘quicktags’ => false ) ); ?>`
Find bbp_the_content( array( ‘context’ => ‘topic’ … and change line to
` ‘topic’, ‘quicktags’ => false ) ); ?>`