Papandopulo Quartet Performance

Fatal error: Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, null given in /var/www/sites/saxoprod/wp-content/themes/saxopen-old/functions.php:775 Stack trace: #0 /var/www/sites/saxoprod/wp-content/themes/saxopen-old/single-event.php(29): SAXOPEN_theme->getEventPhotos() #1 /var/www/sites/saxoprod/wp-includes/template-loader.php(106): include('...') #2 /var/www/sites/saxoprod/wp-blog-header.php(19): require_once('...') #3 /var/www/sites/saxoprod/index.php(17): require('...') #4 {main} thrown in /var/www/sites/saxoprod/wp-content/themes/saxopen-old/functions.php on line 775