Can't login after install x-pack

[1_Maximys_1]

Hi.
I've installed Elasticsearch and Kibana.
Every thing was fine.
But I want install X-Pack with license.
When I did it, I saw message during login to Kibana:
Login is currently disabled because the license could not be determined. Please check that Elasticsearch has the X-Pack plugin installed and is reachable, then refresh this page.

What should I do, to login to Kibana?

Thanks in advance.

P.S. I 've opened logs from elasticsearch and I see this:

[2018-02-24T17:44:57,069][WARN ][o.e.x.s.a.AuthenticationService] [Jh10OEm] An error occurred while attempting to authenticate [kibana] against realm [reserved] - ElasticsearchSecurityException[failed to authenticate user [kibana]]
[2018-02-24T17:44:57,260][INFO ][o.e.n.Node ] [Jh10OEm] stopping ...
[2018-02-24T17:44:57,286][INFO ][o.e.x.w.w.WatchStore ] [Jh10OEm] stopped watch store
[2018-02-24T17:44:57,287][INFO ][o.e.x.m.j.p.l.CppLogMessageHandler] [controller/51] [Main.cc@168] Ml controller exiting
[2018-02-24T17:44:57,342][WARN ][o.e.x.s.a.AuthenticationService] [Jh10OEm] An error occurred while attempting to authenticate [kibana] against realm [reserved] - ElasticsearchSecurityException[failed to authenticate user [kibana]]
[2018-02-24T17:44:57,343][ERROR][i.n.u.c.D.rejectedExecution] Failed to submit a listener notification task. Event loop shut down?

[tylersmalley]

If you have a Gold or Platinum license, I would highly encourage you to contact support as they will ensure a timely response from an engineer.

You will need to update the elasticsearch.password in the kibana.yml to reflect the kibana user.

Here is the documenation for this process: https://www.elastic.co/guide/en/x-pack/current/setting-up-authentication.html