A PHP Error was encountered

Severity: Notice

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

Filename: frontend/carrito.php

Line Number: 211

Backtrace:

File: /home/on24com/public_html/application/views/frontend/carrito.php
Line: 211
Function: _error_handler

File: /home/on24com/public_html/application/controllers/frontend/Carrito.php
Line: 17
Function: view

File: /home/on24com/public_html/index.php
Line: 315
Function: require_once