Issues with Node References and Scene Transitions

[XEnzoneX]

Godot Version

4.3

Question

I’m facing a problem with managing nodes and scene transitions in my project. Here’s a summary of the situation:

Setup:

• The game is played with a main player character and a ghost

• The Player and Spirit each have their own components for movement and activation.

-The player and spirit nodes are encapsulated within a parent node called PlayerAndGhost.

-An autoload global script named ControlManager is used to switch control between the Player and Spirit nodes and to update the active camera.

-I made an Area2D node that changes the scene to another PackedScene through an export variable I add through the inspector

Problem:

When running scenes independently, the ControlManager script correctly switches control between Player and Spirit and updates the camera.
However, when transitioning to a new scene where the PlayerAndGhost node is already in, I encounter the following error: Attempt to call function ‘get_node’ in base ‘previously freed’ on a null instance.

[parth.pc.1804]

Try putting an if statement for is_instance_valid() and put the get_node code inside this if statement.

if is_instance_valid(get_node("nodename"))
	get_node("nodename").method()

I’m assuming you’re trying to call a method on a node that is freed and is yet to be instanced again. Using this if statement skip execution of the method until the node is back in the scene

[XEnzoneX]

So adding it within the control manager made it so that it doesn’t crash now when I switch but they still freeze and can’t move
Did I implement it right