Fatal error: Uncaught Error: Call to a member function prepare() on null in /home/landingp/school.secgotur.xyz/admin/includes/database.php:37 Stack trace: #0 /home/landingp/school.secgotur.xyz/teacher/login.php(10): Database->query('SELECT * FROM g...') #1 {main} thrown in /home/landingp/school.secgotur.xyz/admin/includes/database.php on line 37