NRQL results NULL in "NRQL Status Widget" when querying from metrics

[newtaku]

NRQL querying metrics returns null / Oops Error in the widget.
NRQL itself works fine fine in other dashboard widgets and returns a value.

eg.1 FROM Metric SELECT clamp_max(count(newrelic.sli.good) / count(newrelic.sli.valid) * 100, 100) as 'SLI attainment' WHERE sli.guid = 'GUID'
eg.2 FROM Metric SELECT apm.service.apdex

Steps to Reproduce

• Add Status Widget Pack to an account.
• Launch and select "NRQL Status Widget" to configure
• Configure and add Query retrieving data from Metric

Expected Behaviour

Show and process Metrics in the widget.