Elasticsearch error when attempting to rebuild index after first install

[MrGeneration]

@tlarrea

Unable to process GET request to elasticsearch URL 'https://localhost:9200'. Check the response and payload for detailed information:

@tlarrea

    "number" : "7.17.21",

You provided both relevant information yourself.
Together with our documentation you will see that you’re trying to speak https with a http service.

https://docs.zammad.org/en/latest/install/elasticsearch.html#step-3-connect-zammad