My friend and I are currently running a Mortal Empires campaign with me as The Empire (Karl Franz) and her playing as Wood Elves (Argylwon). 58 turns into the campaign she has a battle against Mousillion vampires and during the end loading screen, my game crashes to desktop. She can load the campaign menu with no issues when I try to join back. But when we ready up, I'm shown the wrong loading screen for my faction (Wood Elves or High Elves) and booted back into the main menu, with the multiplayer screen telling me that her game is full and not allowing me to join back.
We're both only running 1 mod (Nitz' Max Level 60 - 2X Points On Level Up) we've tried restarting our PCs and validating the files through steam, but nothing changed. Finally trying to start a new campaign but it gave the same result.