An uncaught Exception was encountered

Type: Error

Message: Call to a member function result() on null

Filename: /data00/vhosts/apealz.com/httpdocs/application/controllers/Deviceproduct.php

Line Number: 436

Backtrace:

File: /data00/vhosts/apealz.com/httpdocs/index.php
Line: 317
Function: require_once