I've done this correctly several times now, with a full team, 2 people, solo, it doesn't matter it won't complete. After I finish the white blights in the boss room the prompt says it is finished there's just nothing to collect in the rewards room. The bugs are countless atm and are causing friends of mine to quit and tbh if these aren't addressed I will be as well. I don't think you can afford to be losing players like this right now so please get it together!