What does call freeze first mean in Python?

Game Engine Game Engine Support and Discussion
1

I didn’t exactly know what section to place this topic in, so feel free to move it elsewhere to a more fitting place.

Anyway, what does the python error in which it tells me to “call freeze first” mean exactly? There is no freeze() function anywhere.

2

You can’t use a mutatable object as a key, usually is when I get that error.

It usually came up when using a vector as a key.

Try tuple(Vector) if this is the case