The problem seems to be solved. Thank you. However, I find it a bit confusing that you cannot “open” your classroom as a student. Would be nice if this worked like a separate library. In the starting page you don’t see whether a course is added by your teacher or is just another course in the library.
@JulianiTOgo Students can open the Classroom page but only after you add them to Classroom and they became a part of it. On the Classroom page, they can then see “Assigned playlists” list.