Fatal error: Uncaught TypeError: mysqli_num_rows(): Argument #1 ($result) must be of type mysqli_result, bool given in /mnt/web309/d1/91/59590091/htdocs/public/sites/pdf.php:11
Stack trace:
#0 /mnt/web309/d1/91/59590091/htdocs/public/sites/pdf.php(11): mysqli_num_rows(false)
#1 {main}
  thrown in /mnt/web309/d1/91/59590091/htdocs/public/sites/pdf.php on line 11