Unexpected error, game freezes/crashes in siege battles

Playing as Rome sieging Rhegium. They sally out and after 5 crashes I finally come here. Logs provided

*Update* while saving the game it crashed.... I come back a few hours later and I cant load it at all, just crashes. Very frustrated...
Also, im running on windows 10, GTX 960m, quad i7 6700hq dell laptop.

Unfortunately, nothing unusual in your log; looks like graphical/memory overload. Look how much time there is between the last trace and the crash:

Code: [View]

Line 670412: 21:19:21.258 [game.script] [error] Script execution error for <define_unit_group>, at line 31131, in mods/EBII/data/world/maps/campaign/imperial_campaign/campaign_script.txt: 
	Line 670414: 21:19:21.258 [game.script] [error] Script execution error for <define_unit_group>, at line 31131, in mods/EBII/data/world/maps/campaign/imperial_campaign/campaign_script.txt: 
	Line 724382: 21:25:16.314 [system.rpt] [error] Unspecified error. Please compress your error log in a zip format and upload it on the EBII technical help forum.

There's minutes, which in processor time is huge.

Do you have autosave enabled? If you do, it corrupts saves, it should be disabled in the default config.

Yes I do, I just checked and its set to zero....Also my game refuses to go into window borderless mode. Ive changed the config like the installation said both ways with the java menu thing