### 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)

EditorNode::get_singleton()->show_warning(TTR("Can't obtain the script for running."));
					break;
				}
				if (!scr->is_tool()) {
					EditorNode::get_singleton()->show_warning(TTR("Script is not in tool mode, will not be able to run."));
					return;
				}
				current->apply_code();
				Error err = scr->reload(false); 
				if (err != OK) {
					EditorNode::get_singleton()->show_warning(TTR("Script failed reloading, check console for errors."));
					return;
				}
				if (!ClassDB::is_parent_class(scr->get_instance_base_type(), "EditorScript")) {
					EditorNode::get_singleton()->show_warning(TTR("To run this script, it must inherit EditorScript and be set to tool mode."));
					return;
				}
				Ref<EditorScript> es = memnew(EditorScript);
				es->set_script(scr);
				es->set_editor(EditorNode::get_singleton());
				es->_run();
			} break;
			case FILE_CLOSE: {
				if (current->is_unsaved()) {
					_ask_close_current_unsaved_tab(current);
				} else {
					_close_current_tab(false);
				}
			} break;
			case FILE_COPY_PATH: {