Fatal error: Uncaught MongoDB\Driver\Exception\ConnectionTimeoutException: No suitable servers found (`serverSelectionTryOnce` set): [connection refused calling hello on '127.0.0.1:27017'] in /var/www/html/index.php:192
Stack trace:
#0 /var/www/html/index.php(192): MongoDB\Driver\Manager->executeQuery()
#1 {main}
thrown in /var/www/html/index.php on line 192