Fatal error: Uncaught Error: Interface "renderable" not found in C:\xampp\htdocs\laberit01\html\moodle\theme\boost\classes\boostnavbar.php:32 Stack trace: #0 {main} thrown in C:\xampp\htdocs\laberit01\html\moodle\theme\boost\classes\boostnavbar.php on line 32