Fatal error: Uncaught TypeError: mysqli_num_rows(): Argument #1 ($result) must be of type mysqli_result, null given in /home/al14kt7osirajgon/public_html/subCategory.php:27
Stack trace:
#0 /home/al14kt7osirajgon/public_html/subCategory.php(27): mysqli_num_rows()
#1 {main}
thrown in /home/al14kt7osirajgon/public_html/subCategory.php on line 27