Hey there @Atmotrix and welcome to the Ubisoft Discussions!
I understand you have been experiencing crashes in R6S due to an error code. To attempt to fix the situation, I'd recommend changing the "UseProxyAutoDiscovery" value from 0 to 1 in GameSettings.ini file, as this seems to have worked for other players!
Hey @Atmotrix,
I'm sorry to hear that the steps I provided didn't help. So we can further look into this with you, I have opened a case for you, which you'll be able to access via the Ubisoft Support website. I recommend sending us your GameSettings.ini file via this case. This file can usually be found under - "documents/My Games/Rainbow Six - Siege/*UserID*/GameSettings.ini"