I'm having trouble connecting to a replica set.

```
[MongoDB\Driver\Exception\ConnectionTimeoutException]                                                                                                              
No suitable servers found (`serverSelectionTryOnce` set): 
[Server closed connection. calling ismaster on 'a.mongodb.net:27017'] 
[Server closed connection. calling ismaster on 'b.mongodb.net:27017']
[Server closed connection. calling ismaster on 'c.mongodb.net:27017']

```

I however, can connect using MongoChef