I went on the Krokopatra quest and got to her (and was defeated twice), then left to recharge. When I restarted the quest I got to the Test of Strength part...fought all three critters...and the third door wouldn't open and the portal didn't come on. I've tried re-fighting...and then found I was stuck between 2 doors that wouldn't reopen. I popped out and back home...
I would love to get to Marlybone.
Also, I can't get in to deal with Bort Malletmane in the Grand Arena! The gate is down and won't let me through--so I can't finish that quest either. Could that be the problem with Krokopatra? Someone told me I needed to finish the crafting quest before I could go on. I'm working on that now.