Unable to fetch metrics for the Geneva account. Failing with "Unexpected Error"

Question

Hi,

I am trying to setup Grafana dashboards for Geneva and I am successful in getting basic dashboards created. But when i try to create template variables for different metrics following https://eng.ms/docs/products/geneva/dashboards/grafana/genevadashgrafana. But I could able to create only Account variable & Namespace variable but metric variable is failing to fetch data from namespace. Configuration failing with "Unexpected error" but when i try to debug using the browser debug console, the get call to my namepsace is failing with error 500.

Need some help to proceed further.