Warning: mysqli_connect(): (HY000/2002): Connection refused in /var/www/html/go/setupfil.php on line 33

Fatal error: Uncaught TypeError: mysqli_query(): Argument #1 ($mysql) must be of type mysqli, false given in /var/www/html/go/setupfil.php:35 Stack trace: #0 /var/www/html/go/setupfil.php(35): mysqli_query() #1 /var/www/html/go/login.php(3): include_once('...') #2 {main} thrown in /var/www/html/go/setupfil.php on line 35