Connection failed with MongoDB Atlas

[freximo]

when I try to connect mongo atlas with "mongodb+srv://:@/" I present the following error:

forum_test | /usr/local/bundle/gems/mongo-2.5.3/lib/mongo/server_selector/selectable.rb:110:in select_server': No server is available matching preference: #<Mongo::ServerSelector::Primary:0x47040075526120 tag_sets=[] max_staleness=nil> using server_selection_timeout=30 and local_threshold=0.015 (Mongo::Error::NoServerAvailable) forum_test | from /usr/local/bundle/gems/mongo-2.5.3/lib/mongo/collection/view/iterable.rb:41:in block in each'
forum_test | from /usr/local/bundle/gems/mongo-2.5.3/lib/mongo/retryable.rb:44:in read_with_retry' forum_test | from /usr/local/bundle/gems/mongo-2.5.3/lib/mongo/collection/view/iterable.rb:40:in each'
forum_test | from /usr/local/bundle/gems/mongoid-7.0.5/lib/mongoid/query_cache.rb:227:in each' forum_test | from ./app.rb:172:in map'
forum_test | from ./app.rb:172:in `

'
forum_test | W, [2020-11-12T20:30:26.625773 #1] WARN -- : NewRelic agent library not installed
forum_test | W, [2020-11-12T20:30:27.054024 #1] WARN -- : Overwriting existing field _id in class User.
forum_test | W, [2020-11-12T20:30:27.084090 #1] WARN -- : MONGODB | Unsupported client option 'max_retries'. It will be ignored.
forum_test | W, [2020-11-12T20:30:27.084160 #1] WARN -- : MONGODB | Unsupported client option 'retry_interval'. It will be ignored.
forum_test | W, [2020-11-12T20:30:27.084182 #1] WARN -- : MONGODB | Unsupported client option 'timeout'. It will be ignored.

Then I modify a file located in the path: "cs comments service / config / mongoid.yml" like this:

https://github.com/freximo/cs_comments_service/blob/master/config/mongoid.yml

and finally I did the connection tests and it worked.