Could you try renaming/moving your EU4 user directory and see if anything changes?
If still stuck, please post new thread in tech support sub forum as your issue will get handled there. https://forum.paradoxplaza.com/forum/index.php?forums/euiv-technical-support.812/
If still stuck, please post new thread in tech support sub forum as your issue will get handled there. https://forum.paradoxplaza.com/forum/index.php?forums/euiv-technical-support.812/