Infinite Loading of Query Inspector JSON

Hello, I have a trouble when i use Query Inspector with JSON datasource. I have an infinite loading.

My json datasource is :

The setting is configured like this :

You using browser access, have you setup CORS?

Try latest nighly builds there was a fix to query inspector yesterday so that it shows responses for errors.

Also check your chrome browser dev tools console for network errors.

I have the same problem with a BigQuery (JSON) Data Source.
Grafana verions is 6.7.2.
How do you fix that ?