Godot Autoload disappeared, but still exists?

[Grimshad]

Tested versions

4.3 Stable

System information

Windows 10

Issue description

My autoload went missing from the autoload list, it won't let me readd it because it already exists and all of the references to it now throw errors that it doesn't exist.

Steps to reproduce

Created an autoload, SignalManager with associated script.
Edit the editor settings to use external editor
close godot
open godot
Autoload is gone, but if I try to add it again, it says it already exists.

Minimal reproduction project (MRP)

I can't reproduce it.

[Saulo-de-Souza]

The class you add in AutoLoad cannot have a name, that is, the script cannot look like this: "class_name SignalManager extends Node", for example. Remove the class name and leave it like this: "extends Node". Leave the file name like this: signal_manager.gd and AutoLoad will automatically create the SignalManager singleton