@alejandro-fernandez You are using MudrunnerMod or normal 4gb patch i suppose?
The onframemove funtion is trying to read or write at the pointed adress and fail to get value or write either because something has screwed adresses or there is nothing at that address or you have an instabilty somewhere created by the 4gb patch or hardware limitation(not enough memory in your system or ram failure).
If you re using hight quality mod it can screw up memory managment and even more if you re using a lot of them in one party and if people are using them too, even if you have a 4gb patch (LAA) wich can still create some problem.
Also since that function is updating the state of world i think, it will allways crash at some point since it will always try to access an address often.
You can allways try to freeze game time but still i m not sure it will solve that issue.