A third repair solved the problem it seems. I have no idea what was different this time, but it works now. Thanks!

I have done so, twice even. No effet :/

Hello,

I just recently reinstalled the game on a machine on which I already logged ~100h. The hardware hasn't changed, but the OS and drivers have been updated. While starting, I got 2 different errors, one of which I was able to solve on my own.
I use the latest version (1.1.53) of the game ...