Warning: mysqli_connect(): php_network_getaddresses: getaddrinfo for db failed: Name or service not known in /home/mova/public_html/pga_traipu/includes/class/class.MySQL.php on line 38

Fatal error: Uncaught mysqli_sql_exception: php_network_getaddresses: getaddrinfo for db failed: Name or service not known in /home/mova/public_html/pga_traipu/includes/class/class.MySQL.php:38
Stack trace:
#0 /home/mova/public_html/pga_traipu/includes/class/class.MySQL.php(38): mysqli_connect('db', 'pga', Object(SensitiveParameterValue), 'pga_traipu', 3306)
#1 /home/mova/public_html/pga_traipu/includes/connect.php(4): MySQL->connect()
#2 /home/mova/public_html/pga_traipu/includes/config.php(44): require_once('/home/mova/publ...')
#3 /home/mova/public_html/pga_traipu/dashboard.php(4): require_once('/home/mova/publ...')
#4 {main}
  thrown in /home/mova/public_html/pga_traipu/includes/class/class.MySQL.php on line 38