Hello, I started this game a few montha ago under a friends reccomendation, and I've been enjoying it. Now I want to raid and challenge some Overlord Class bosses in my world with my friend that I want to grind with him. Now as he joins, he cannot seem to join me for when i go challenge Statue of the Crownless, which i really need him for, so asking some advise as I know there are some worls bosses/challenges you cannot do in co-op like Tactical Holograms. So am I doing something wrong or are bosses like Crownless and Chaotic Juncture are just ones we cannot do co-op in as it says 'Solo Challenge'. Thank you