An uncaught Exception was encountered

Type: Error

Message: Call to undefined method Promo::GAPI_CallAPI()

Filename: /var/www/vhosts/otr.id/httpdocs/application/controllers/Promo.php

Line Number: 1977

Backtrace:

File: /var/www/vhosts/otr.id/httpdocs/index.php
Line: 315
Function: require_once