Greetings, Devil Dog! Welcome to the Call of Duty Forums. It looks like you're looking forward to Call of Duty: Modern Warfare, but haven't created an account yet. Why not take a minute to register for your own free account now? As a member you get free access to all of our forums and posts plus the ability to post your own messages, communicate directly with other members and much more.
i tried:
1) "scan & repair"
2) deleting everything but the data folder, then letting the launcher reinstall the missing files
3) rolling back my GPU drivers to the december build
4) opening all recommended ports so NAT type would be open
5) started the game with admin privileges
i didn't bother with AV since i got only windows security running
the problem seems to have reemerged on january 26th, at least many people are reporting it starting with this date, the same day there was an nvidia update.
some people reported that rolling back to the last version (from jan 7th) fixed their problem (would probs not work for me, since i initially got the error when i was still running the jan 7th build yesterday, then updated to jan 26th, still sapphic error), still it seems to be somehow connected to the GPU driver update, but maybe it's not just client side?!
my specs:
ryzen 7 2700x
GTX 1080
16GB RAM
Samsung 970 Evo plus