The Den on Hexbear is local only. There appears to be an issue with the comm where you cannot upvote comments, you can't report comments, if you try to leave a comment you get an error but the comment posts anyway, if you try and edit your comment you get an error.
So i've set my Wizard Tower to Local Only, and I've opened it up for posting by others. I want to see if this is a Hexbear issue or an issue on Lemmy more broadly.
Try to leave a comment in this thread, or post a new thread in the comm. Try and up vote the thread, up vote the comments, etc.
Ok interesting. I get the same "Couldn't find comment" error here like I was on hexbear.