Log in as admin Create a test user Navigate to Users > Permissions > Define roles in site administration Edit the Manager role Remove permission for moodle/role:assign capability and save Navigate to Users > Permissions > Assign system roles in site administration Assign test user to Manager role Create a new course Log in as test user Navigate to course Press Participants from secondary navigation Select Permissions > Other users from tertiary navigation Confirm page loads without the following exception: Exception - Argument 1 passed to renderer_base::render() must implement interface renderable, instance of stdClass given, called in [dirroot]/enrol/otherusers.php on line 99   Debug info: Error code: generalexceptionmessage Confirm Assign roles button is not present next to tertiary navigation