So I went to war as the Morgawr against the Ardent Mages with the main purpose of capturing their Urkan. I attacked the Urkan once, but then decided it would simply be easier to eliminate the Ardent Mages. Having done so, however, the Urkan is still under their control, despite them being eliminated from the game. I can't attack it without "declaring war", but that option is grayed out/costs infinite influence. Kind of a minor issue, but has anyone else experienced this? Is there some nuance that I'm missing (that wouldn't be surprising), or is this some sort of bug? 

On top of that, the save file now no longer works.  It will get stuck at the "Waiting for other empires" stage.

I've attached the .sav file for your review.  Thanks for the help!

Morgawr .sav

Are you using the Community Patch Mod? Because you probably should be if your are not.

I've tried to reproduce this bug, but have been unable to do so. In all my attempts, the Urkans reverted to their wild, uncontrolled state when their controlling empire was wiped out.

i experienced the same exact bug when killing the Cultists, and i hit the same "waiting for players" bug a few turns later. the file seems to have been fully corrupted as well, being unable to load it, crashing my game and erasing the settings. I was using the community patch at the time though, it was the most recent one before the 1.7.5 aplitude patch.

i'll upload the file later this weekend if i remember.