### 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)

ERR_FAIL_COND(!p_obj);
	Ref<Script> scr = p_obj->get_script();
	ERR_FAIL_COND(!scr.is_valid());
	EditorNode::get_singleton()->push_item(scr.ptr());
	for (int i = 0; i < tab_container->get_tab_count(); i++) {
		ScriptEditorBase *se = Object::cast_to<ScriptEditorBase>(tab_container->get_tab_control(i));
		if (!se) {
			continue;
		}
		if (se->get_edited_resource() != scr) {
			continue;
		}
		se->add_callback(p_function, p_args);
		_go_to_tab(i);
		script_list->select(script_list->find_metadata(i));
		
		if (!scr.ptr()->is_built_in()) { 
			save_current_script();
		}
		break;
	}
}
void ScriptEditor::_save_editor_state(ScriptEditorBase *p_editor) {