Can't find a crash nor understand the error log

[Tilarium]

I've tried to play 2 modded games since 1.13 launched and both games have hit crashes pretty early in. I'm bugging out trying to figure out what the cause is, tried removing various mods to try and find the culprit but still crashing no matter the combination. I can't make heads or tails of the error log. The last things in it are:

[11:29:01][E][jomini_script_system.cpp:284]: Script system error!
Error: has_trait trigger [ trait was null ]
Script location: file: common/on_action/darkages_on_actions.txt line: 629 (darkages_more_illnesses_on_action:trigger)
file: common/on_action/zz_lmfmod_on_actions.txt line: 291 (random_yearly_everyone_pulse)

[11:29:01][E][portraitmanager.cpp:2052]: Accessory male_gaelic_high_noble_circlet_02 is not usable on portrait type boy, it is scripted only for group

The script system error repeats multiple times. I've asked on the Dark Ages mod and was told that's nothing to worry about and have tried with LMF turned off. With that off, it turned into "file: common/on_action/yearly_on_actions.txt line: 1342 (random_yearly_everyone_pulse)" so confident that LMF isn't the problem (either on it's own or clashing with another mod). I'm including the error.log from the first go on this game before I started fiddling around to try and find it in case anyone is actually able to make heads or tails of it.

 

[Tilarium]

So I've gone through my mods list, disabling little by little and crashing at the same point in this game. Weird thing happened during one of the tests which gave me a new avenue to try after all the mods. Seems the problem is my custom character. During one of the tests, he died during a travel event and his young brother took over, and the game didn't crash. Going do some more testing to see if it's still a mod issue causing custom landless characters to crash or vanilla.