Fatal error: Uncaught Error: Class "WP_STATISTICS\User" not found in /usr/local/www/irenakulesza.pl/wp-content/plugins/wp-statistics/includes/admin/class-wp-statistics-admin-user.php:17 Stack trace: #0 /usr/local/www/irenakulesza.pl/wp-content/plugins/wp-statistics/includes/admin/class-wp-statistics-admin-user.php(114): WP_STATISTICS\Admin_User->__construct() #1 {main} thrown in /usr/local/www/irenakulesza.pl/wp-content/plugins/wp-statistics/includes/admin/class-wp-statistics-admin-user.php on line 17