I'm on my Lab to update from 6.6.1 to 7.2  After all work done, I had on the tab Monitoring this error on the lower right corner of the browser:   Monitoring Request Error  [illegal_argument_exception]  Fielddata is disabled on text fields by default. Set fielddata=true on [event.dataset] in order to load fielddata in memory by uninverting the inverted index.Note that this can however use significant memory. Alternatively use a keyword field instead.: Check the Elasticsearch Monitoring cluster n...