Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, class Errorhandler does not have a method "showcase" in /home/peruinno/public_html/app/core/Core.php:50 Stack trace: #0 /home/peruinno/public_html/index.php(7): Core->__construct() #1 {main} thrown in /home/peruinno/public_html/app/core/Core.php on line 50