An exception occurred: [TypeError] mysqli_num_rows(): Argument #1 ($result) must be of type mysqli_result, bool given in /www/clients/download.io/htdocs/templates3/windows/category-all.php on line 42

  1. mysqli_num_rows() in /www/clients/download.io/htdocs/templates3/windows/category-all.php at line 42
  2. include() in /www/clients/download.io/htdocs/index.php at line 213