Fatal error: Uncaught TypeError: mysqli_query(): Argument #1 ($mysql) must be of type mysqli, null given in /home/sugohid/public_html/szamlalo.php:26 Stack trace: #0 /home/sugohid/public_html/szamlalo.php(26): mysqli_query() #1 /home/sugohid/public_html/index.php(12): include_once('/home/sugohid/p...') #2 {main} thrown in /home/sugohid/public_html/szamlalo.php on line 26