Fatal error: Uncaught Error: Class 'Whoops\Handler\Handler' not found in /var/www/html/burs/vendor/filp/whoops/src/Whoops/Handler/CallbackHandler.php:16 Stack trace: #0 {main} thrown in /var/www/html/burs/vendor/filp/whoops/src/Whoops/Handler/CallbackHandler.php on line 16