I just encountered something new. I am playing 3.8.4, finally got a castle and of course, first order of business is setting up a CKO. I made an order, but every time I talk to the steward to upgrade their equipment, after I select it and try to leave the conversation, the screen goes black and does not recover. I can hear things happening in the background, but I end up having to kill the PoP game in task manager. I am a long-time player, set up many CKOs before, so I don't think I did anything out of the ordinary to cause it.
Any ideas?