Fatal error: Uncaught TypeError: extract(): Argument #1 ($array) must be of type array, null given in /home/www/college.hamdard.edu.pk/wp-content/plugins/tutor/views/quiz/attempt-table.php:2 Stack trace: #0 /home/www/college.hamdard.edu.pk/wp-content/plugins/tutor/views/quiz/attempt-table.php(2): extract(NULL) #1 {main} thrown in /home/www/college.hamdard.edu.pk/wp-content/plugins/tutor/views/quiz/attempt-table.php on line 2