A PHP Error was encountered

Severity: Warning

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

Filename: frontend/Download.php

Line Number: 48

Backtrace:

File: /home/bakpkupnyk17/public_html/application/controllers/frontend/Download.php
Line: 48
Function: _error_handler

File: /home/bakpkupnyk17/public_html/index.php
Line: 324
Function: require_once