I'm aware the boss is here, but the Garden has become the Dark Garden on my account full of shadow servants and such. Is there any way to get rid of this? Because I need that cap...and I don't see any other way of reaching it.
You need to hitch a ride with someone who isn't as far along in the story line to get in. I'm having the same problem. Good luck finding someone nice enough to spare 15 seconds to go and open a door for you though.