Since the update with the off-duty uniform my second uniform (which is now in my third slot) can no longer be equipped. It says slot not unlocked and I need to join a fleet to unlock it.
First - i am in a fleet
Second - that never happened before the patch - I could swap and change between 2 full uniforms. Now I can only wear either my first uniform slot or my off duty slot (which is rubbish due to the very limited customisation options - eg no gloves)