So I delayed doing the Contact public event that’s required before decoding umbral engrams until I got to 1000 power. But along the way I collected so many umbral engrams that my engram inventory filled up. Now that I’ve done the Contact public event, I went to the Drifter to turn in that part of the mission and he’s trying to give me an engram, but I can’t accept because the inventory is full. And I can’t unload anything from the engram inventory into the vault, or dismantle any, or decode any! What do I do?!