Hello,
I wanted to contact you directly but found no way to.
There is currently a ghost nation bug in the game. Some nations do not exist, yet still, declare war/form alliances. As far as I can see it has to do with revolts being taken over by nations other than the nation they originated from. It affects gameplay as the AI dedicates armies to these non-existent countries and then they get attacked by another country that actually exists and completely collapse.