[nospheratt]

Well, at least you finally figured what the problem was.

The tags widget I think it’s part of the Forums Extras Plugin. If you already have Forums Extras installed, you just have to activate the tags plugin on your plugins page. If not, get it here: https://buddypress.org/community/groups/buddypress-group-forum-extras/

Cheers!

[nospheratt]

Another stupid question: You don’t have another slug defined for the forums on bp-custom.php, do you?

Also, when you hover the forums tab, it shows the correct url?

[nospheratt]

Just trying to help with some ideas. This may be a stupid question, but have you checked if the groupforums url exists? The internal forums work in that slug?

Could be a permalinks issue. Or maybe it’s a conflict with the groups slug?