Fatal error: Uncaught MongoDB\Driver\Exception\ConnectionTimeoutException: No suitable servers found (`serverSelectionTryOnce` set): [connection closed calling hello on '127.0.0.1:27017'] in /var/www/php/vendor/mongodb/mongodb/src/Operation/Find.php:337 Stack trace: #0 /var/www/php/vendor/mongodb/mongodb/src/Operation/Find.php(337): MongoDB\Driver\Server->executeQuery() #1 /var/www/php/vendor/mongodb/mongodb/src/Collection.php(663): MongoDB\Operation\Find->execute() #2 /var/www/php/web/app/online_pj/online_pj.php(91): MongoDB\Collection->find() #3 /var/www/php/web/libs/bootstrap.php(276): Online_pj->Index() #4 /var/www/php/web/index.php(84): Bootstrap->__construct() #5 {main} thrown in /var/www/php/vendor/mongodb/mongodb/src/Operation/Find.php on line 337