A PHP Error was encountered

Severity: Notice

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

Filename: about/activities_details.php

Line Number: 48

Backtrace:

File: /var/www/html/new_wub_site/wub_new_theme/application/views/frontend/about/activities_details.php
Line: 48
Function: _error_handler

File: /var/www/html/new_wub_site/wub_new_theme/application/core/MY_Controller.php
Line: 37
Function: view

File: /var/www/html/new_wub_site/wub_new_theme/application/controllers/Main.php
Line: 91
Function: inner_layout

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

" data-sizes="auto" class="single-content-main-img" src="https://wub.edu.bd/admin-assets/images/activitiesImg_thumb/ " sizes="371px">