An Unexpected Error has Occurred

Currently I am completely unable to log on my main character. I patched the game last night fine, and I was able to log on and play for about an hour this afternoon, then as I was approaching Amdapor Keep to unlock the hard mode version of it, my game halfway locked up. I was able to move my camera, but no models on the screen were moving, and I couldn't access any menus or UI elements.

I force-quit the game, and ever since, I've been completely unable to log on to that character. I'll get to the loading screen, then after a few seconds or a minute, the game will freeze, then crash to desktop. I can still log on to my other characters fine, so it seems to be a location issue, rather than something like my drivers, my connection, or my computer.

The error I get when I crash tells me absolutely nothing, being just a generic "an unexpected error has occurred" message.