"Hello, my web application needs to connect to an external MySQL database. The connection is being blocked. Could you please ensure your firewall allows outgoing TCP traffic to the hostname shuttle.proxy.rlwy.net on port 17464?"

getting this error{

A PHP Error was encountered

Severity: Warning

Message: mysqli::real_connect(): Server sent charset (255) unknown to the client. Please, report to the developers

Filename: mysqli/mysqli_driver.php

Line Number: 211

Backtrace:

File: /var/www/html/index.php
Line: 320
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: mysqli::real_connect(): (HY000/2054): Server sent charset unknown to the client. Please, report to the developers

Filename: mysqli/mysqli_driver.php

Line Number: 211

Backtrace:

File: /var/www/html/index.php
Line: 320
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: Cannot modify header information - headers already sent by (output started at /var/www/html/system/core/Exceptions.php:272)

Filename: core/Common.php

Line Number: 571

Backtrace:

File: /var/www/html/index.php
Line: 320
Function: require_once

A Database Error Occurred

Unable to connect to your database server using the provided settings.

Filename: core/CodeIgniter.php

Line Number: 519

}

my db array{

$db['default'] = array(
    'dsn'      => '',
    // Hostname should NOT include the port number.
    'hostname' => 'shuttle.proxy.rlwy.net',
    'username' => 'root',
    'password' => '<password>',
    'database' => 'railway',
    'dbdriver' => 'mysqli',
    'db_debug' => (ENVIRONMENT !== 'production'),
    'cache_on' => FALSE,
    'cachedir' => '',
    'char_set' => 'utf8',
    'dbcollat' => 'utf8_general_ci',
    'swap_pre' => '',
    'encrypt'  => FALSE,
    'compress' => FALSE,
    'stricton' => FALSE,
    'failover' => array(),
    'save_queries' => TRUE,
    // The correct port from Railway goes here.
    'port'     => 17464,
);
}