I am suffering from the same problem since some update shortly before the release.
The game (only multiplayer is affected) gets stuck on the loading screen, but it doesn't actually hang completely, it just takes an incredibly long time to start – last time I just let it do its thing and I got into the game after 84 minutes of loading, then the login timed out and I could only close it. Restarting the game produced seemingly the same result (I didn't actually wait another 84 minutes, I just shut it down after 20).
I tried updating my nvidia drivers, Windows, anti-cheat, reinstalling the game twice, revalidating the data, etc. – nothing helped so far.
Thanks for the tip with the server helper module, with that enabled the game actually loads quickly and I can at least log in, although ofc I can't join any servers due to module mismatch, which makes me wonder what could be the cause.
Any more tips would be highly appreciated.