I'm trying to return a dace request to someone and every time I try the 'dance=username' code for them I get the error page "Oh No! You and your dance partner both have to be wearing a special mask to participate in the Atebus Revolution Masquerade." and I've managed to send requests to other people on the forums with no problems and they had sent me many requests so I would think it is safe to assume we are both wearing masks.

I really want to repay the requests they have sent me, but can't...

Can you let me know the username? It may be that they were changing and their mask hasn't shown yet.

Sure, it's Iris

Unless she is hiding it really well I can't see a mask on her. You may want to message her and see if she maybe took it off.