This was raised here in the past, yet I couldn't find the answer for my use case:
I installed Logstash (5.6.0), ElasticSearch (5.6.0) and Kibana (5.6.0) in the same machine. I was able to access Kibana and play a little with elasticsearch.
After I installed x-pack (5.6.0), I recieved the following message when I'm trying to enter Kibana's portal:
"_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."
I read here that I need to update the expired license (which was expired after 2 days - odd), but I can't update the new downloaded license, because I can't access Kibana.
Please bare in mind that this is my first experience with ES