A similar instance happened when I was messing around with a bunch of mods - at that point I re-installed.

This time I started a new game this afternoon, got ~50 turns into it and closed it down.  Went to re-open tonight and it keeps crashing on load.  No intermediate changes.   It seems to load - I can see my sov's army, and the terrain - but everything is dark.  Then it crashes.

Debug, save, and previous autosave are included in link

https://www.dropbox.com/sh/t8am6ykx6tjlelt/TxQ5t9l9Qb

I usually rotate 5 saves, 1 through 5.   The most recent broken is #4, #3 is broken, same with 1 and 2 and auto/previous auto.   #5 - the furthest back, seems to work.  Adding all 5 to zip.  #5 is about a half hour back, so I'm not heartbroken now.   If you do not want to pursue, I can close.