### 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)

memdelete(completion_cache);
}
void ScriptEditorPlugin::edit(Object *p_object) {
	if (Object::cast_to<Script>(p_object)) {
		Script *p_script = Object::cast_to<Script>(p_object);
		String res_path = p_script->get_path().get_slice("::", 0);
		if (p_script->is_built_in() && !res_path.is_empty()) {
			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);
			}
		}
		script_editor->edit(p_script);
	} else if (Object::cast_to<TextFile>(p_object)) {
		script_editor->edit(Object::cast_to<TextFile>(p_object));
	}
}
bool ScriptEditorPlugin::handles(Object *p_object) const {