A PHP Error was encountered

Severity: Warning

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

Filename: controllers/Category.php

Line Number: 145

Backtrace:

File: /var/www/html/stage/application/modules/category/controllers/Category.php
Line: 145
Function: _error_handler

File: /var/www/html/stage/index.php
Line: 315
Function: require_once