No home page on game start. Critical

the game doesn’t open the home page (from which I can play the game), it only shows weird things, the music still plays, but nothing else. This happened since I changed graphics card to the 7800 xt, I tried uninstalling reinstalling the game multiple times. In its state, it’s unplayable.

here are the files : Transfer - Dropbox

oh boi, there are numerous threads about this. maybe a Mod can consolidate them?