A PHP Error was encountered

Severity: Notice

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

Filename: controllers/Tindaklanjut.php

Line Number: 48

Backtrace:

File: /var/www/html/application/controllers/Tindaklanjut.php
Line: 48
Function: _error_handler

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