A PHP Error was encountered

Severity: Notice

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

Filename: controllers/Download.php

Line Number: 35

Backtrace:

File: C:\inetpub\wwwroot\tti\application\web_modules\web\controllers\Download.php
Line: 35
Function: _error_handler

File: C:\inetpub\wwwroot\tti\index.php
Line: 315
Function: require_once