Fatal error: Uncaught Error: Interface 'renderable' not found in /home/junior47895/public_html/aulavirtual/AulaVirtual_22Apr/lib/classes/output/notification.php:36 Stack trace: #0 {main} thrown in /home/junior47895/public_html/aulavirtual/AulaVirtual_22Apr/lib/classes/output/notification.php on line 36