Due to a recent update the borders of the Everfree and Summerdale were adjusted which casuses Equestria Divided to crash. Don't lament just yet. There's a way to get around this by making an adjustment manually. Just follow these instructions.

HEADS UP!
Be sure to backup the files you will be editing in case something goes wrong. If all else fails you can unsubscribe and resubscribe to refresh the mod from the workshop.

1. Navigate to the states folder for Equestria Divided.
   - This should be located in your steam folder under steamapps\workshop\content\394360\2144499326\history\states
   
2. Find and open 1-Everfree Forest.txt.
   
3. Remove 3604, 9598, and 11570 from the provinces brackets. Save. The line should look like this...
   
   provinces={ 512 553 3579 3626 3655 6449 6533 6599 6780 9434 9550 9578 9582 9629 11535 11584 }
4. Find and open 97-Forget-me-not meadows.txt.
   
5. Add 3604, 9598, and 11570 to the provinces brackets. Save. The line should look like this...
   
   provinces={ 641 762 780 1616 3604 3770 6789 6946 6985 9590 9598 9752 11276 11568 11570 11628 11734 11833 }

This should temporarily fix the problem, allowing play of Equestria Divided. Enjoy.