### 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)

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) {
			se->clear_breakpoints();
		}
	}
	
	List<String> cached_editors;
	script_editor_cache->get_sections(&cached_editors);
	for (const String &E : cached_editors) {
		Array breakpoints = _get_cached_breakpoints_for_script(E);
		for (int i = 0; i < breakpoints.size(); i++) {
			EditorDebuggerNode::get_singleton()->set_breakpoint(E, (int)breakpoints[i] + 1, false);
		}
		if (breakpoints.size() > 0) {
			Dictionary state = script_editor_cache->get_value(E, "state");
			state["breakpoints"] = Array();
			script_editor_cache->set_value(E, "state", state);
		}
	}
}
Array ScriptEditor::_get_cached_breakpoints_for_script(const String &p_path) const {