OK, this is getting weird ;p
So, basically - I've got the same issue as all you good folks -> game just crashes at start, since the installation of the latest patch. Sometimes I see the white "report issue" window, sometimes the game starts, or rather appears to be starting but gets
stuck and task manager shows it's doing nothing, no CPU usage, no RAM usage, the process just... exists.
Steam version, trying to launch using the Paradox app and the game executable. Tried
everything - admin rights, Windows Ransomware thingy, etc.
And, well... I just got a little bit mad (
I WANT MY CK AND I WANT IT NOW, GODDAMIT, <smashingsounds.mp3>) and simply tried launching the game as many times as possible.
It worked. Somehow. Please see the screenshot attached, it's from the task manager - as you can see, I've got two stuck ck3 instances (marked as "F"), and one working just fine, marked as "W". The game is working in the background, just as I write this.
So, my advice - try executing (brute-forcing?) the CK3.exe file until the game starts properly. I have no idea why this works, I can't say if this will work in every case, but it's worth a try.
And, yeah - game runs fine. I've just loaded my save game, CK3 appears to be working OK, no bugs, no slowdowns, no lag.
I'm kind of confused right now, to be completely honest with you
EDIT:
I've killed the two stuck instances you can see above, just to see what will happen. Seems that, well, nothing happened - the stuck processes disappeared, it didn't affect the "good" instance at all, the game still works fine.