### Godot version

4.0 beta 12 mono

### System information

MacOS 13.1, Apple M1 Pro

### Issue description

When `text_editor/external/use_external_editor` is set to true but `text_editor/external/exec_path` is not set and I create a new script and attach it to a node Godot freezes and i need to force quit the application.
Also after a restart when double clicking on the script the application freezes but I can quit normally

### Steps to reproduce

- Set Use External Editor to true in Editor Settings and leave Exec Path empty
- Create a new project with Moblie Renderer and Git Versioning in Godot
- Create a 3D Scene
- Create a gd script in the FileSystem inspector or directly attach the script to a node

### Minimal reproduction project

[New Game Project.zip](https://github.com/godotengine/godot/files/10420510/New.Game.Project.zip)

if (text_file.is_valid()) {
			edit(text_file, true);
			return;
		}
		
	} else if (path.contains("::")) {
		
		String res_path = path.get_slice("::", 0);
		if (ResourceLoader::get_resource_type(res_path) == "PackedScene") {
			if (!EditorNode::get_singleton()->is_scene_open(res_path)) {
				EditorNode::get_singleton()->load_scene(res_path);
			}
		} else {
			EditorNode::get_singleton()->load_resource(res_path);
		}
		Ref<Script> scr = ResourceLoader::load(path);
		if (scr.is_valid()) {
			edit(scr, true);
			return;
		}
	} else if (!path.is_resource_file()) {
		_help_class_open(path);
		return;
	}
	rc.remove_at(p_idx);
	EditorSettings::get_singleton()->set_project_metadata("recent_files", "scripts", rc);
	_update_recent_scripts();
	_show_error_dialog(path);
}
void ScriptEditor::_show_error_dialog(String p_path) {