A PHP Error was encountered

Severity: Notice

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

Filename: views/topNav.php

Line Number: 20

Backtrace:

File: /home/u239737065/domains/oliveschool.org.in/public_html/quiz/application/views/topNav.php
Line: 20
Function: _error_handler

File: /home/u239737065/domains/oliveschool.org.in/public_html/quiz/application/views/new_add_quiz.php
Line: 119
Function: include

File: /home/u239737065/domains/oliveschool.org.in/public_html/quiz/application/controllers/Teacher.php
Line: 129
Function: view

File: /home/u239737065/domains/oliveschool.org.in/public_html/quiz/index.php
Line: 315
Function: require_once