ThanaturFor devs to actually manage to fix bugs that prohibit me to buy pacts, interact with NPCs and manage my inventory so I can get back in game sounds like something that would be nice to have but I know I'm being too optimistic, right?
Have you filed tickets about this? I know that there are some people who have occasional problems, but this sounds as if your client is completely bonkers.
I have been having problems on not just one, but both my PCs and not only I have filed tickets, I have interacted with GMs through emails about this.
I saw the thread about the compacted files and it didn't solve it unfortunately.