Without knowing what your code looks like, that’d be difficult to say. The line causing the issue is in IPlayer.cpp on line 31. Try checking your pointers before accessing them, by encapsulating it in an if-statement. Taking an example of something from some code I’ve written before:
Instead of just accessing my UHUD_Widget* directly, like so: HUD->RemoveFromParent();
I instead do this:
if (HUD) {
HUD->RemoveFromParent();
}
This way my code is only executed if HUD isn’t a null-pointer.
As for why your pointer may be a null-pointer? Well, you’ll need to share more of your code if you want help with that.