Hello.
Workspace:
Joomla!, 4.0.0-beta8-dev
Plugin T4 System v1.1.5
Template (default) T4 Blank v1.1.0
When adding a menu item, an error appears:
Argument 2 passed to PlgSystemT4::onAfterGetMenuTypeOptions() must be an instance of MenusModelMenutypes, instance of Joomla\Component\Menus\Administrator\Model\MenutypesModel given, called in D:\OpenServer\domains{Name of site}.local\libraries\src\Plugin\CMSPlugin.php on line 2851