Fatal error: Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, null given in /wp-includes/post-template.php:240 Stack trace: #0 /wp-includes/post-template.php(202): get_the_content() #1 /wp-content/themes/umagdy-gronowo.pl/content.php(18): the_content() #2 /wp-includes/template.php(503): require('...') #3 /wp-includes/template.php(477): load_template() #4 /wp-includes/general-template.php(179): locate_template() #5 /wp-content/themes/umagdy-gronowo.pl/index.php(23): get_template_part() #6 /wp-includes/template-loader.php(74): include('...') #7 /wp-blog-header.php(16): require_once('...') #8 /index.php(17): require('...') #9 {main} thrown in /wp-includes/post-template.php on line 240