Login as admin and create a new course with " Course visibility " set to " Hide " Enrol a user A as a teacher in this course Logout Login as user A and open this course Open your user menu and click " Switch role to... " Switch the role to a role that does not have the 'moodle/course:viewhiddencourses' capability (usually student) Confirm that the role switching works Open your user menu again and click " Return to my normal role " to switch back to your own role Turn editing on Add the "Calendar" block to the course Switch the role to student again Confirm that the course page loads with the calendar block. Confirm that you don't see the error with the notice "Sorry, but you do not currently have permissions to do that (View hidden courses)" Switch back to your normal role. Delete the block "Calendar" from the course Add the block "Upcoming events" Switch the role to student again Confirm that the course page loads with the calendar block. Confirm that you don't see the error with the notice "Sorry, but you do not currently have permissions to do that (View hidden courses)"