Hello Ubisoft!
I'm having the same problem here. code MOUNTAIN-00700.
Running it as Administrator. The game starts and first says it could not synchronize the cloud saves. Which is weird because I don't have cloud saves yet.
After skipping this error the game starts, I get to the first screen (press SPACE to start) and then I get MOUNTAIN-00700.
I'll try again some basic troubleshooting and see if it runs. I'll check later if there is any other info here.
Thanks!