Controllers on the PC are broken at the moment. If you use the interact button at any point after loading up the game, it crashes the game - doesn’t matter if you’re in a map or in the keep. You currently have to use the keyboard for all interactions.
Reproduction steps:
load game
have a controller plugged in
hit the interact button
(X on XBox style, or Square on a PS style controller)
EDIT: Unfortunately due to unexpected circumstances we haven’t been able to resolve this issue today. The investigation continues and we apologise for the inconvenience.