### 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)

se->connect("edited_script_changed", callable_mp(this, &ScriptEditor::_script_changed));
	se->connect("request_help", callable_mp(this, &ScriptEditor::_help_search));
	se->connect("request_open_script_at_line", callable_mp(this, &ScriptEditor::_goto_script_line));
	se->connect("go_to_help", callable_mp(this, &ScriptEditor::_help_class_goto));
	se->connect("request_save_history", callable_mp(this, &ScriptEditor::_save_history));
	se->connect("search_in_files_requested", callable_mp(this, &ScriptEditor::_on_find_in_files_requested));
	se->connect("replace_in_files_requested", callable_mp(this, &ScriptEditor::_on_replace_in_files_requested));
	se->connect("go_to_method", callable_mp(this, &ScriptEditor::script_goto_method));
	
	_test_script_times_on_disk(p_resource);
	_update_modified_scripts_for_external_editor(p_resource);
	if (p_line > 0) {
		se->goto_line(p_line - 1);
	}
	notify_script_changed(p_resource);
	return true;
}
void ScriptEditor::save_current_script() {
	ScriptEditorBase *current = _get_current_editor();
	if (!current || _test_script_times_on_disk()) {
		return;
	}
	if (trim_trailing_whitespace_on_save) {
		current->trim_trailing_whitespace();
	}
	current->insert_final_newline();
	if (convert_indent_on_save) {
		if (use_space_indentation) {
			current->convert_indent_to_spaces();
		} else {