Grafana 7, Expected response data to be array, got object

[BasvanH]

With Grafana 7, when I add a graph and select the JSON datasource to the grafana-rrd-server I get an error saying: Expected response data to be array, got object.

With F12 I do see /search return my data:

["pdns_recursor:concurrent-queries", "pdns_recursor:cache-hits", "pdns_recursor:server-parse-errors",…]

The data is generated by PowerDNS, nothing I can really do about it.