A PHP Error was encountered

Severity: Notice

Message: Trying to access array offset on value of type null

Filename: cart/view.php

Line Number: 137

Backtrace:

File: /var/www/vhosts/excursionmania.net/httpdocs/application/modules/frontend/views/cart/view.php
Line: 137
Function: _error_handler

File: /var/www/vhosts/excursionmania.net/httpdocs/application/third_party/MX/Loader.php
Line: 362
Function: include

File: /var/www/vhosts/excursionmania.net/httpdocs/application/third_party/MX/Loader.php
Line: 304
Function: _ci_load

File: /var/www/vhosts/excursionmania.net/httpdocs/application/helpers/my_helper.php
Line: 28
Function: view

File: /var/www/vhosts/excursionmania.net/httpdocs/application/modules/frontend/controllers/Cart.php
Line: 29
Function: view

File: /var/www/vhosts/excursionmania.net/httpdocs/index.php
Line: 315
Function: require_once