Grafana dashboard panel is showing "Request Error"

I am using Azure instance of Grafana, and i am trying to setup monitoring for Azure databricks using grafana dashboards. I have used the link : to setup the grafana and its dashboard. But when i completed the setup, the panels in the Grafana dashboard is showing “Request Error” on top it. When i looked in to the query of the panel, its showing "TypeError: undefined is not iterable (cannot read property Symbol(Symbol.iterator)) as error.