Fatal error: Uncaught mysqli_sql_exception: Host '172.18.0.3' is not allowed to connect to this MySQL server in /var/www/html/rsvp.php:7 Stack trace: #0 /var/www/html/rsvp.php(7): mysqli->__construct('mysql', 'root', Object(SensitiveParameterValue)) #1 {main} thrown in /var/www/html/rsvp.php on line 7