Fatal error: Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, null given in /var/www/dentaurum-instanzen/php/ProductGroupExtended.inc.php:13 Stack trace: #0 /var/www/dentaurum-instanzen/php/Search.inc.php(359): ProductGroupExtended->getHtmlProductGroupList() #1 /var/www/dentaurum-instanzen/php/Controller.inc.php(57): Search::getHtmlProductGroups() #2 /var/www/dentaurum-instanzen/public/search.php(59): Controller::getMainContent() #3 {main} thrown in /var/www/dentaurum-instanzen/php/ProductGroupExtended.inc.php on line 13