Getting ACCESS_TOKEN_TYPE_UNSUPPORTED - map[method:google.logging.v2.LoggingServiceV2.ListLogEntries service:logging.googleapis.com

Hi team,
when trying to setup Cloud logging DS in grafana I'm getting:

```
failed to run test query: list entries: rpc error: code = Unauthenticated desc = Request had invalid authentication credentials. Expected OAuth 2 access token, login cookie or other valid authentication credential. See https://developers.google.com/identity/sign-in/web/devconsole-project. error details: name = ErrorInfo reason = ACCESS_TOKEN_TYPE_UNSUPPORTED domain = metadata = map[method:google.logging.v2.LoggingServiceV2.ListLogEntries service:logging.googleapis.com]
```

Permissions are set as per documentation:


JWT Json key file properly loaded in grafana:


is this possibly a bug?