If upload new revision can't be clicked, it's probably because the orderer hasn't rejected the artwork. The artwork needs to be in state Rejected (the orderer needs to reject) in order to enabling upload of a new revision.
If upload new revision can't be clicked, it's probably because the orderer hasn't rejected the artwork. The artwork needs to be in state Rejected (the orderer needs to reject) in order to enabling upload of a new revision.