I have the same issue and have had it since August as far as I am aware. I’ve tried Asobo’s support desk three times now to no avail, all I get is canned answers. I wish they would at least collect a crash report or some diagnostics from me so I know that they’re trying to find a trend from all these crashes people are having, but they are not.
I’ve actually been a system admin for 10 years and I’m not new to computer problems. This, however, I have not been able to solve after five months of google searching and troubleshooting. All I know is this game works until I connect it to the internet. I wouldn’t be surprised to learn it’s DRM related.