As the title says I encountered a fatal error during the end turn. I tried restarting the game and repressing end turn but it happened again. Any file that I should provide to allow you to investigate the issue? How do I get such file?
Edit: Maybe I understood what caused it. I had 2 fleets parked in a system where a scripted mission takes place but didn't do the mission. I reloaded an older game and didn't go to that system, it works fine for now.
Edit 2: What I described happened during a necron campaign. I tried to do the same during an imperial campaign, but had no problems there. I parked my good old Spire in a scripted mission system, didn't start the mission and ended the turn expecting the crash to happen, but the crash didn't happen.