A PHP Error was encountered

Severity: Notice

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

Filename: frontend/activities_details.php

Line Number: 142

Backtrace:

File: /var/www/html/new_wub_site/pharmacy_new/application/views/frontend/activities_details.php
Line: 142
Function: _error_handler

File: /var/www/html/new_wub_site/pharmacy_new/application/core/MY_Controller.php
Line: 21
Function: view

File: /var/www/html/new_wub_site/pharmacy_new/application/controllers/Main.php
Line: 422
Function: layout

File: /var/www/html/new_wub_site/pharmacy_new/index.php
Line: 315
Function: require_once