Attempt to call function 'get_character_name' in base 'null instance' on a null instance. Invalid access to property or key 'resource_path' on a base object of type 'null instance'.

[rubatozis]

The problem

Describe the bug
I'm not sure if it's a bug or if I'm being stupid but I'm trying to make a simple logic for loading the game upon pressing play on the menu and it keeps giving me this error: Attempt to call function 'get_character_name' in base 'null instance' on a null instance. Alternatively (see below) I get this other error instead: Invalid access to property or key 'resource_path' on a base object of type 'null instance'.

To Reproduce
From menu:

# PLAY/CONTINUE BUTTON
func _on_button_1_pressed() -> void:
	get_tree().change_scene_to_file("res://scenes/game.tscn") # Leave menu and go to game scene

Then the game scene. This is pretty much copied from the docs:

func load_save_game_slot(slot_name: String) -> void:
	if Dialogic.Save.has_slot(slot_name):
		Dialogic.Save.load()

# Called when the node enters the scene tree for the first time.
func _ready() -> void:
	load_save_game_slot("Default")

But upon testing i get this error: Attempt to call function 'get_character_name' in base 'null instance' on a null instance.
Which points to this line of code:
var container := dialogic.PortraitContainers.load_position_container(character.get_character_name())
Inside res://addons/dialogic/Modules/Character/subsystem_portraits.gd.

Expected behavior
For the save to load normally.

System (please complete the following information):

• OS: Windows 10
• Godot Version: 4.2.2
• Dialogic Version: 2.0 Alpha 16

Solutions

Workaround

I have tried calling the timeline first:

# Called when the node enters the scene tree for the first time.
func _ready() -> void:
	Dialogic.start("test_timeline")
	load_save_game_slot("Default")

Which gives me a different error of a similar kind:
Invalid access to property or key 'resource_path' on a base object of type 'null instance'.
Which points to this line of code:
dialogic.current_state_info['portraits'].erase(character.resource_path)
Inside res://addons/dialogic/Modules/Character/subsystem_portraits.gd.

This is most definitely my fault in some way but I am a brand new dev so... Don't really know what to do. Plz be patient.