[2022] File exception error

This is certainly an issue from AVG. You are 100% sure both paradox launcher.exe and eu4.exe are allowed through all its exceptions lists? You may need help from their support in that.

I did get this from one AVG user:

In AVG there is a system where you can see all currently running programs so i kept that open and ran the launcher and was able to identify specific file/program that AVG was blocking and then unblock it