Создал страницу для редактирование новостей, но есть ошибка?

Создал страницу для редактирование новостей. Всё работает, могу редактировать, но в начале вылазиет ошибка:

A PHP Error was encountered
Severity: Notice

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

Filename: controllers/News.php

Line Number: 68

Backtrace:

File: C:\xampp\htdocs\kinomonster\application\controllers\News.php
Line: 68
Function: _error_handler

File: C:\xampp\htdocs\kinomonster\index.php
Line: 315
Function: require_once
A PHP Error was encountered
Severity: Notice

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

Filename: controllers/News.php

Line Number: 69

Backtrace:

File: C:\xampp\htdocs\kinomonster\application\controllers\News.php
Line: 69
Function: _error_handler

File: C:\xampp\htdocs\kinomonster\index.php
Line: 315
Function: require_once
A PHP Error was encountered
Severity: Notice

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

Filename: controllers/News.php

Line Number: 70

Backtrace:

File: C:\xampp\htdocs\kinomonster\application\controllers\News.php
Line: 70
Function: _error_handler

File: C:\xampp\htdocs\kinomonster\index.php
Line: 315
Function: require_once

Кто-нибудь скажет в чем дело?