Logstash unable to reach es cluster on elastic cloud

Hi,
I'm experimenting with the elastic cloud for the first time and I have some issue when I try the simple example found here: https://www.elastic.co/blog/building-cloud-sandbox-with-sample-data-v2. When I try to do the logstash (ver 2.1.3) command, I get this error (stars and CAPS are mine):

https: unknown error {:class=>"Manticore::ResolutionFailure", :level=>:error}
Logstash startup completed
..........Attempted to send a bulk request to Elasticsearch configured at 
'["HTTP://HTTPS://***.us-east-1.aws.found.io:9243/"]', but an error occurred
 and it failed! 
Are you sure you can reach elasticsearch from this machine using the 
configuration provided? 
{:client_config=>{:hosts=>["http://https://***.us-east-1.aws.found.io:9243/"]
  , :ssl=>nil, :transport_options=>{...} ...}

My apache_logstash.conf seems to be good:

  elasticsearch {
    hosts => "https://***.us-east-1.aws.found.io:9243"
    user => "***"
    password => "***"
    index => "apache_elastic_example"
    template => "./apache_template.json"
    template_name => "apache_elastic_example"
    template_overwrite => true
  }

The error seems to show that the url is not well formed. I removed in my conf file the https header but it does not work, maybe because it tries to use http and not https. How could I force the utilization of https? Can I use https with basic authentication? The Import Data shown at the link provided above seems to say yes.

By the way, this simple curl command works:

curl -XGET -u *** -p https://***.us-east-1.aws.found.io:9243

Thanks for your help

It looks like that old version of Logstash does not allow the protocol to be specified as part of the string. I would recommend upgrading to the latest version of Logstash.

You're right, it works with logstash's last version. Thank you for your help Christian.
P.