So I send my email, got a new key back a day later, no problem at all. But now when I'm ingame I can't connect to Paradox Connect for some reason. Also, if I want to look at the achievements it says achievements are disabled due to the save file is belonging to another profile or the game being modded, neither of wich is true. So I though I had to activate my game again on Steam, but now with the new key. However, Steam did not accept my key. I'm really confused now and hope anyone can help and understands my (confusing) explanation?
Edit: Forgot to mention I have the 5.1 patch.