A PHP Error was encountered

Severity: Notice

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

Filename: helpers/functions_helper.php

Line Number: 228

Backtrace:

File: /var/www/html/application/helpers/functions_helper.php
Line: 228
Function: _error_handler

File: /var/www/html/application/controllers/Notification.php
Line: 7
Function: auth_login

File: /var/www/html/index.php
Line: 316
Function: require_once