Fatal error: Uncaught Error: Call to a member function execute() on null in /var/www/html/graduation2022/_inc/sbg2018.php:356 Stack trace: #0 /var/www/html/graduation2022/_inc/sbg2018.php(137): getgraduates() #1 /var/www/html/graduation2022/index.php(12): getpi() #2 {main} thrown in /var/www/html/graduation2022/_inc/sbg2018.php on line 356