Fatal error: Uncaught Error: Call to a member function delete_by() on null in /var/www/api/application/controllers/cnam.php:78 Stack trace: #0 /var/www/api/system/core/CodeIgniter.php(359): Cnam->index() #1 /var/www/api/index.php(202): require_once('/var/www/api/sy...') #2 {main} thrown in /var/www/api/application/controllers/cnam.php on line 78