On crash, line 13397> variable_struct_get(l_meta, "live:self") returned undefined into local variable "l_self1" I could give you my project file, but I wouldn't call it small. I'm down to troubleshoot on my end more if you have any other ideas?
I can tell that live:self is undefined if it throws that error, but what is in self?
As making GameMaker extensions is not my full-time job, I have limited capacity for debugging issues in large projects - especially when many these turn out to be GameMaker bugs or self-sabotage.