Fatal error: Uncaught MongoDB\Driver\Exception\ConnectionTimeoutException: No suitable servers found (`serverSelectionTryOnce` set): [connection refused calling hello on 'localhost:27017'] in /var/www/html/api/startup.php:30 Stack trace: #0 /var/www/html/api/startup.php(30): MongoDB\Driver\Manager->executeQuery() #1 /var/www/html/api/startup.php(422): oDataStore->getObjects() #2 /var/www/html/index.php(24): system->launch() #3 {main} thrown in /var/www/html/api/startup.php on line 30