If it is free, I would like to know how can I get this license.
I mean, I have already installed ELK in my machine when I tried to create security features like enabling roles I need to get Elastic license instead of ES basic license.
You don't need to "get" the license. It is part of the binary (installer) files. So for example if you want the V2 open licenses download from here Download Elastic Products | Elastic
Version: 7.12.1
like the same link you sent, then downloaded for my Windows 64 bit ZIP file.
In this If I want to enable roles in security feature, should I have Elasticsearch license?
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