A PHP Error was encountered

Severity: Notice

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

Filename: controllers/Category.php

Line Number: 41

Backtrace:

File: /home/jujutsu/autocontentgenerator.xyz/application/controllers/Category.php
Line: 41
Function: _error_handler

File: /home/jujutsu/autocontentgenerator.xyz/index.php
Line: 315
Function: require_once