A PHP Error was encountered

Severity: Notice

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

Filename: categories/overzicht_filter_detail.php

Line Number: 8

Backtrace:

File: /home/zorgkompas/domains/zorgtechnologiekompas.be/public_html/application/views/categories/overzicht_filter_detail.php
Line: 8
Function: _error_handler

File: /home/zorgkompas/domains/zorgtechnologiekompas.be/public_html/application/controllers/Categories.php
Line: 66
Function: view

File: /home/zorgkompas/domains/zorgtechnologiekompas.be/public_html/index.php
Line: 315
Function: require_once