Hello, I've been trying to connect a signal from a non-global scene to another non-global scene, and up until now every tutorial was made for Godot 3.x and many errors popped out.

I didn't see any tutorial on this on Godot 4, so does anyone know how to?
Thanks a lot!

Here's a Godot 4 tutorial on using signals:
https://docs.godotengine.org/en/4.0/getting_started/step_by_step/signals.html#using-signals

You may also need this:
https://docs.godotengine.org/en/4.0/classes/class_signal.html#signal

You can also use the Object class for signals, but according to the documentation, it's better to use the Signal class. There's some explanation here:
https://docs.godotengine.org/en/4.0/classes/class_object.html#class-object-method-connect