### 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)

if (r_error) {
		*r_error = ERR_FILE_CANT_OPEN;
	}
	String local_path = ProjectSettings::get_singleton()->localize_path(p_path);
	String path = ResourceLoader::path_remap(local_path);
	TextFile *text_file = memnew(TextFile);
	Ref<TextFile> text_res(text_file);
	Error err = text_file->load_text(path);
	ERR_FAIL_COND_V_MSG(err != OK, Ref<Resource>(), "Cannot load text file '" + path + "'.");
	text_file->set_file_path(local_path);
	text_file->set_path(local_path, true);
	if (ResourceLoader::get_timestamp_on_load()) {
		text_file->set_last_modified_time(FileAccess::get_modified_time(path));
	}
	if (r_error) {
		*r_error = OK;
	}
	return text_res;
}
Error ScriptEditor::_save_text_file(Ref<TextFile> p_text_file, const String &p_path) {