A PHP Error was encountered

Severity: Notice

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

Filename: libraries/Library.php

Line Number: 898

Backtrace:

File: /var/www/html/application/libraries/Library.php
Line: 898
Function: _error_handler

File: /var/www/html/application/controllers/Writer.php
Line: 41
Function: get_reporter_from_name

File: /var/www/html/index.php
Line: 292
Function: require_once