BigQuery API: access denied

Hi, we just got started with Grafana to test with Google BigQuery. We would like to use the Google BigQuery API, we have created the Grafana Service Key with read and user job roles active for the project, but when we try to “Save & Test” the response from BigQuery is:

BigQuery: Access Denied: Job myataset-push:no-such-jobs: The user grafana@mydomain-push.iam.gserviceaccount.com does not have permission to access the job mydomain-push:no-such-jobs.

Any help much appreciated!