Warning: mysqli::__construct(): php_network_getaddresses: getaddrinfo for pga3-db-1 failed: Name or service not known in /home/mova/public_html/pga3/inc/class/class.MySQL.php on line 26

Fatal error: Uncaught mysqli_sql_exception: php_network_getaddresses: getaddrinfo for pga3-db-1 failed: Name or service not known in /home/mova/public_html/pga3/inc/class/class.MySQL.php:26
Stack trace:
#0 /home/mova/public_html/pga3/inc/class/class.MySQL.php(26): mysqli->__construct('pga3-db-1:3377', 'pga', Object(SensitiveParameterValue), 'pga')
#1 /home/mova/public_html/pga3/inc/connect.php(4): Database->connect()
#2 /home/mova/public_html/pga3/index.php(15): include('/home/mova/publ...')
#3 {main}
  thrown in /home/mova/public_html/pga3/inc/class/class.MySQL.php on line 26