Error when I test a level with F6

[labylo]

I'm sorry, I'm trying to understand how this great add-on works, but when I try to test a level (by pressing the F6 key), I get a Godot error:

Invalid call. Nonexistent function 'is_object_stored' in base 'Nil'.

This error occurs in the function "register_storable_object_with_marker()", line 229.

Am I completely misunderstanding something? Is there a specific step I need to take to use this add-on while still being able to test levels independently? As much as possible, I would like to avoid modifying the plugin's code.

Thanks for any help

[KoBeWi]

You need to initialize save data to use some functions. You can do it in an autoload node. You can also use my Custom Runner addon, the integration is explained in the wiki.

[labylo]

Thanks for your answer, I will try...