I'm also having the same problem in Game 3,469,562. It was fine until day change and all of the a sudden, the map became black. Once you turn off enhanced, you can move the screen to some places but once you move to a certain place, the screen stops moving and you can't see any units, provinces etc.
For a lot of my friends and I, the quarantine is going to be over soon and we'll need to get back to work in a few weeks. Can we please squeeze in a speed round? The last all-in historical speed round was insanely fun. There was a lot more active players in the two rounds I joined compared to the normal maps I've played before.