A PHP Error was encountered

Severity: Notice

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

Filename: site/Teams.php

Line Number: 20

Backtrace:

File: /home/aitvfauc/ttb.mn/application/controllers/site/Teams.php
Line: 20
Function: _error_handler

File: /home/aitvfauc/ttb.mn/public_html/index.php
Line: 316
Function: require_once