A PHP Error was encountered

Severity: Notice

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

Filename: mysqli/mysqli_driver.php

Line Number: 120

Backtrace:

File: /home/u1093636/public_html/serversidetest/application/controllers/Auth.php
Line: 8
Function: __construct

File: /home/u1093636/public_html/serversidetest/index.php
Line: 140
Function: require_once