Well I can tell it's not a machine problem since I don't have the problem with other mods such the Github version of VIET Immersion, nor with Project Augustus. I do have this problem in the base game actually though last I checked, and also have had it in A Game of Thrones mod. Had it in the base "A Game of Thrones" mod with no submods, though that may of been in 9.1; can't remember, pretty sure it happened it 9.2 but what Im going to say that follows makes that seem unlikely. Still if it helps I have started playing 9.2 again, was unplayable for awhile with the crashes, and this time with the submod More Decisions; since I was getting crashes anyways figured what the heck, and had similar problem until I took a hint from someone else and deleted the Create Assassin's Guild parts of More Decisions religion and all and have not had problem yet so far about 100 years in though I also did use knuckey
fix from earlier in this thread, while before I had a random crashes before after every 20-50 years no matter the start date I get none for now. Don't know which fix it was, but together they seemed to help. If I get crashes again will update accordingly. I can sympathize with those having problems; believe me I stopped playing the mod over it for awhile, but at the same time problems like in this game engine are strange and often very difficult to hunt down, so really don't blame the devs, but definitely frustrating other can play this awesome mod without trouble, and you can't for seemingly no reason. Only reason I mention any of this in case it can help.