A PHP Error was encountered

Severity: Notice

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

Filename: views/category.php

Line Number: 13

Backtrace:

File: /var/www/vhosts/tenhowgo.com/httpdocs/application/views/category.php
Line: 13
Function: _error_handler

File: /var/www/vhosts/tenhowgo.com/httpdocs/application/controllers/Category.php
Line: 40
Function: view

File: /var/www/vhosts/tenhowgo.com/httpdocs/index.php
Line: 315
Function: require_once