Fatal error: Uncaught TypeError: mysqli_num_rows(): Argument #1 ($result) must be of type mysqli_result, bool given in /var/www/vhosts/meehan.gen.nz/httpdocs/tngconnect.php:130 Stack trace: #0 /var/www/vhosts/meehan.gen.nz/httpdocs/tngconnect.php(130): mysqli_num_rows() #1 /var/www/vhosts/meehan.gen.nz/httpdocs/heatmap.php(218): tng_num_rows() #2 {main} thrown in /var/www/vhosts/meehan.gen.nz/httpdocs/tngconnect.php on line 130