So tonight I got the endless load screen when I attempted to enter this instance. I had to kill the game and after rebooting attempted to log into another character to pick up some mail. I never even got a loading screen, it just was stuck at "Loading character data". I had to kill the game again. Logged back in to the first character and was able to successfully enter Cryptwatch Fort. After making my way through, I attempted to leave the instance and, after a very long load screen, crashed to the log-in screen with the message that an unknown error had occurred. This happened a second time after I relogged the game. Finally, on the third log-in, I just used fast-travel to the nearest wayshrine from within Cryptwatch Fort and was able to get out.
Has this happened to anyone else? I had not had this issue since shortly after launch so I thought it had been fixed. Also, I want to know if the problem is unique to this specific crawl/instance or if it is a widespread problem.