Looking into your pastebin, it seems that you have a few addons running and loaded. Can you try to reset your interface and see if this error occurs still?
Hi Vossprey, thanks for your answer. I’ve tried to play without addons, but that’s not practical. My keybinds are in Bartender, my healing depends on Vuhdo, my auction house trading on TSM, and so on. I’ve updated the post above with new crashes as they occurred.
(Recently edited because I thought I had found the cause, but that wasn’t true, the problem came back.)