Fatal error: Uncaught Error: Call to a member function prepare() on null in C:\xampp\htdocs\conferences\iccmc\registration\include\dbase.php:37 Stack trace: #0 C:\xampp\htdocs\conferences\iccmc\registration\index.php(8): Database->query('select name fro...') #1 {main} thrown in C:\xampp\htdocs\conferences\iccmc\registration\include\dbase.php on line 37