I'm afraid the game is getting stuck for me too.
Nevertheless, I think the issue might be the framerate because the 120 cap doesn't work (the fps counter shows around 300) and I even managed to load in the first mission once after capping it at 60.
Sadly, I restarted to confirm my findings and couldn't get it to work again because the framerate cap in the settings gets reset every time now and there's no appy/save settings button.
I wish I could be more helpful but that's as far as I got.