I know you tried everything but, what worked for me is uninstalling WARSAW, i hope you fix your game, its a good game, but dont expect a answer here, nobody from t10 helped me, some random user solved my problem.
I haven’t been able to get past the “press enter to start” since the 10/10 update. So if your version is either 1.197.396.2 or 1.197.899.2 you probably have the same problem.
99% of the suggestions on the forum are utter rubbish. Their support site is also fabulously broken too, just try signing in with the password you just created too.
I have a ticket open #5652 but I expect that Just Cause 4 will be out before I get to play this game again!
Anyway, you aren’t alone in your disenchantment.
Strangely, the advice to downgrade your NVIDIA drivers has disappeared I wonder why that is…