When I choose a data source and click preview, I get one of two errors, depending on the source. If I use TimeLion and I get a [timelion] > Request failed with status code 502. If I go with Elasticsearch raw documents, I get [esdocs] > Unexpected error from Elasticsearch: [unsupported_operation_exception] null
Is there some kind of setup that's required, is Canvas a paid license feature only?
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