### 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)

Vector<String> scenes_to_save;
	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 (convert_indent_on_save) {
			if (use_space_indentation) {
				se->convert_indent_to_spaces();
			} else {
				se->convert_indent_to_tabs();
			}
		}
		if (trim_trailing_whitespace_on_save) {
			se->trim_trailing_whitespace();
		}
		se->insert_final_newline();
		if (!se->is_unsaved()) {
			continue;
		}
		Ref<Resource> edited_res = se->get_edited_resource();
		if (edited_res.is_valid()) {
			se->apply_code();