InfluxDB Error: Internal Server Error with flux data source on Grafana

Hi

Please refer to the below screen.
InfluxDB version: 1.7.8
Grafana version: 6.3.5
grafana-influxdb-flux-datasource: 5.3.2
flux-enabled = true is set in influxdb.conf and flux is working via CLI.

Any help, please? Thanks!

Looks like Default bucket is mandatory. Hopefully, it helps someone in the future with the same issue

Thanks for all the great work!