nagot gick fell?

[brxbrx]

I'm assuming this is Swedish or Norwegian (whatever the programmers speak).
The message reads "myfree: corrupted mem block (high)"
Now, I swear I've bought the game, and my purchased version worked fine until this point.
I tried installing a couple of mods, (Haidi Gwai [thanks for revommending sombre] and some extra pretenders), that's when the mesage first appeared. I removed the mods, still happens.
Now, I'll concede that I haven't done further troubleshooting or thread searching (which I'm really bad that), and reaching out to the community is my first recourse.
Thanks for any help.