A PHP Error was encountered

Severity: Warning

Message: mysqli::real_connect(): php_network_getaddresses: getaddrinfo failed: Name or service not known

Filename: mysqli/mysqli_driver.php

Line Number: 201

Backtrace:

File: /var/www/html/application/config/routes.php
Line: 178
Function: DB

File: /var/www/html/index.php
Line: 315
Function: require_once

An uncaught Exception was encountered

Type: Error

Message: Class 'CI_Controller' not found

Filename: /var/www/html/system/core/CodeIgniter.php

Line Number: 369

Backtrace:

File: /var/www/html/application/config/routes.php
Line: 178
Function: DB

File: /var/www/html/index.php
Line: 315
Function: require_once