### 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)

switch (p_option) {
		case THEME_IMPORT: {
			file_dialog->set_file_mode(EditorFileDialog::FILE_MODE_OPEN_FILE);
			file_dialog->set_access(EditorFileDialog::ACCESS_FILESYSTEM);
			file_dialog_option = THEME_IMPORT;
			file_dialog->clear_filters();
			file_dialog->add_filter("*.tet");
			file_dialog->popup_file_dialog();
			file_dialog->set_title(TTR("Import Theme"));
		} break;
		case THEME_RELOAD: {
			EditorSettings::get_singleton()->load_text_editor_theme();
		} break;
		case THEME_SAVE: {
			if (EditorSettings::get_singleton()->is_default_text_editor_theme()) {
				ScriptEditor::_show_save_theme_as_dialog();
			} else if (!EditorSettings::get_singleton()->save_text_editor_theme()) {
				EditorNode::get_singleton()->show_warning(TTR("Error while saving theme"), TTR("Error saving"));
			}
		} break;
		case THEME_SAVE_AS: {
			ScriptEditor::_show_save_theme_as_dialog();
		} break;
	}
}
void ScriptEditor::_show_save_theme_as_dialog() {