why am i gettin this?,,invalid get index 'global_position'(on base: 'null instance)

[distant rose]

player is null. You are using get_node and passing a resource path to it

get_node can only be used when the node is present in the tree

so you need to pass the reference in a different way

[exotic patrol]

and how?

i tried by preloading it but that didnt work either

[distant rose]

you have to either use an auto-loaded script to store global variables (like player, and then your player can set itself to it)
or when you spawn the mob you pass the reference

preload will not help either because that is the Resource, not the node. It does not exist in the tree.

[exotic patrol]

how do I make an auto loaded script?

[distant rose]

you just create a script like any other, but you set it up here

that will be added as a node as soon as you start the game and can be accessed from anywhere

so let's say you called it Globals and add a variable called player

in your player script you can do

func _ready():
    Globals.player = self

then you can grab the player from anywhere with Globals.player