### 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)

_copy_script_path();
			} break;
			case SHOW_IN_FILE_SYSTEM: {
				const Ref<Resource> scr = current->get_edited_resource();
				String path = scr->get_path();
				if (!path.is_empty()) {
					if (scr->is_built_in()) {
						path = path.get_slice("::", 0); 
					}
					FileSystemDock *file_system_dock = FileSystemDock::get_singleton();
					file_system_dock->navigate_to_path(path);
					
					TabContainer *dock_tab_container = (TabContainer *)file_system_dock->get_parent_control();
					dock_tab_container->set_current_tab(dock_tab_container->get_tab_idx_from_control(file_system_dock));
				}
			} break;
			case CLOSE_DOCS: {
				_close_docs_tab();
			} break;
			case CLOSE_OTHER_TABS: {
				_close_other_tabs();
			} break;
			case CLOSE_ALL: {
				_close_all_tabs();
			} break;
			case WINDOW_MOVE_UP: {
				if (tab_container->get_current_tab() > 0) {
					tab_container->move_child(current, tab_container->get_current_tab() - 1);
					tab_container->set_current_tab(tab_container->get_current_tab());
					_update_script_names();