I always get "Guests can't do anything here.", no matter if I put the Scheduler on the front page or part of a course, no matter if I assign teacher and student roles to the Scheduler activity or not.
When adding a new Scheduler, it immediately shows "Guests can't do anything here." after I click "Save and display".
Is this a bug, or have I missed something?
I'm on Moodle 3.8 with Scheduler 3.7.0.