Attempt to call function 'play' in base 'null instance' on a null instance.

Question

i'm gaving an error and i tried everything and it doesn't work
here is my code:

# checks the state of the player aka skin
func skin_change():
    loader()
    if player_skin == 0:
        $AnimationPlayer.play("duck_collision")
        if !is_on_floor():
            $AnimatedSprite.play("duck_jump")
        else:
            $AnimatedSprite.play("duck_run")

    elif player_skin == 1:
        $AnimationPlayer.play("goose_collision")
        if !is_on_floor():
            $AnimatedSprite.play("goose_jump")
        else:
            $AnimatedSprite.play("goose_run")

Answer 1

It's difficult to answer because you don't say which line has the error, but either $AnimatedSprite or $AnimationPlayer doesn't exist relative to the node which has this code.

Comments

the error is at "$AnimationPlayer.play("duck_collision")"

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It's $AnimationPlayer then.