Fatal error: Uncaught TypeError: mysqli_num_rows(): Argument #1 ($result) must be of type mysqli_result, bool given in /var/www/vhosts/cmsflow.com/httpdocs/include/inc/BD.php:199 Stack trace: #0 /var/www/vhosts/cmsflow.com/httpdocs/include/inc/BD.php(199): mysqli_num_rows() #1 /var/www/vhosts/cmsflow.com/httpdocs/pagina_detalle.php(51): BD->ExecuteScalar() #2 /var/www/vhosts/cmsflow.com/httpdocs/producto_detalle.php(8): require_once('...') #3 /var/www/vhosts/cmsflow.com/httpdocs/router.php(60): include('...') #4 {main} thrown in /var/www/vhosts/cmsflow.com/httpdocs/include/inc/BD.php on line 199