For some reason I messed up the groups permission rules, which caused people were not beeing able to join anymore and not beeing able to submit art anymore.
I am sorry for that. I now fixed it. If something appear a little odd still please message us about that.
The main reason I changed the permission was to make it easier for you to get your art approved faster.
I hope it will work again.
Please, let me know if something doesn't work. I try to fix it asap