When I went to submit I got a message that the target folder was over its size limit.
When this happens, you need to make new folders. Go to Gallery, make new folders, and then - oh, so crucial, -
1 Go to Admin Area
2 and then into Manage Members
3 and then into Members.
4 There should be words in blue that say "Show All Folders". There are useful dialogue boxes for the Group Leader here.
YOU NEED TO GO TO FEATURED 2 AND OPEN IT TO THE GROUP MEMBERS. Otherwise nobody can submit anything.