Fatal error: Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, null given in C:\xampp\htdocs\mysite\sitemap\sitemap.php:20 Stack trace: #0 C:\xampp\htdocs\mysite\sitemap\index.php(4): require_once() #1 {main} thrown in C:\xampp\htdocs\mysite\sitemap\sitemap.php on line 20