A PHP Error was encountered

Severity: Notice

Message: Undefined index: post_id

Filename: controllers/Campaign.php

Line Number: 55

Backtrace:

File: /home/wvi/public_html/application/modules_front/giving/controllers/Campaign.php
Line: 55
Function: _error_handler

File: /home/wvi/public_html/index.php
Line: 320
Function: require_once