bbPress.org

Hidden fields look fine to me.

What happens if you choose to include the forum base slug in your permalinks? Are you able to post then?

Is it possible that the content you’re attempting to post is the *exact* same as the content of another post in that same topic? I noticed in your video that the template notices that are normally in the reply area have been removed in your custom theme. That means if the duplicate post is being caught, you’re not getting any feedback notices.