when i try to set an inexistent lesson type (foo), the error message says lesson type is null.  <!--session: 1743756338134-0deaee06-29ae-4db7-9b5f-e9bfc5f37b4e--> <!--Version: Desktop v3.6.0-->
when i try to set an inexistent lesson type (foo), the error message says lesson type is null.