Fatal error: Uncaught TypeError: mysqli_num_rows(): Argument #1 ($result) must be of type mysqli_result, bool given in /homepages/32/d508815922/htdocs/r8/php/rgrp.php:360 Stack trace: #0 /homepages/32/d508815922/htdocs/r8/php/rgrp.php(360): mysqli_num_rows(false) #1 {main} thrown in /homepages/32/d508815922/htdocs/r8/php/rgrp.php on line 360