Fatal error: Uncaught TypeError: mysqli_num_rows(): Argument #1 ($result) must be of type mysqli_result, bool given in /home/httpd/vhosts/dbfcz.ch/dbfcz_test/spieler.php:1567
Stack trace:
#0 /home/httpd/vhosts/dbfcz.ch/dbfcz_test/spieler.php(1567): mysqli_num_rows(false)
#1 {main}
  thrown in /home/httpd/vhosts/dbfcz.ch/dbfcz_test/spieler.php on line 1567