I've hit turn 70 of the Open Dev, and my game is crashing at the start of the turn (before I can do anything). I can't tell what may be causing it, and the crash happens immediately upon loading the autosave from turn 70. I've tried going back to turn 69, to avoid the bug, but I was unable to- I had no units move, No tech that should have been completed, No current wars, I disabled narrator and tutorial, but it still crashed once I ended the turn and turn 70 started. It just pops up a small Unity error window, 

I'd experiment more, but having to sit through the entire intro video each time makes that a little rough.

Anyways, if there are any workarounds people have found, or if there's anything else I can do to help fix it, I'd appreciate it.

Thanks!

I had the same sort of thing happen.  I was in the process of moving from Neolithic up, clicked on the end turn button and the screen went yellow(ish) then the crash handler came up and the whole machine froze, i could not exit the game. I had to restart and am trying again...

I am also crashing to desktop.  It happens right after login on save 69, as soon as I click on one of my units.  The crash indicator flashes the drops to  desktop