I'm having the exact same problem in the "defeat Prince Ati Karanahn" quest. I'm at the door but it won't open. I've done all the other Krokotopia quests except the beetles; surely the door should open? HELP PLEASE!
I cant remember krok all that well. Have you checked if that is one of the quests you have to figure a puzzle out to gain entrance. Are there any porters in the area (circle with blue light). I wish i could remember this quest im sorry im not that much help .