I was playing a long iron man game so I reverted back to 2.8.3.4 so as to not corrupt the old save. It started up fine once. Then, mid game it crashed. Now, it's not even starting up in 2.8.3.4. Instead, it crashes at some point during loading history. I've validated the game file in Steam. I went to 3.0 to test and that loads up fine at least though I haven't tried starting a new game. The error log shows this:
######## EXCEPTION: 0xE06D7363 at address: 0x748E1812: <unkown exception>
Version: Unknown Version
11/16/18 19:29:44
######## EXCEPTION: 0xC0000005 at address: 0x0117BE2E: ACCESS VIOLATION read attempt to address 0x00000040
Version: Unknown Version
11/16/18 19:30:45
The first error is the mid game one. The second error is the one that occurs every time now while CK2 loads up.
######## EXCEPTION: 0xE06D7363 at address: 0x748E1812: <unkown exception>
Version: Unknown Version
11/16/18 19:29:44
######## EXCEPTION: 0xC0000005 at address: 0x0117BE2E: ACCESS VIOLATION read attempt to address 0x00000040
Version: Unknown Version
11/16/18 19:30:45
The first error is the mid game one. The second error is the one that occurs every time now while CK2 loads up.