Array support in grafana/flux

It gives same error in Explorer:

I am running influxdb 1.8. I know it’s not latest, but upgrade has some constraints.
I thought flux was directly built in latest versions of Grafana (and it’s not dependent on influxdb)
So, is it because of influxdb version ?

Earlier, I remember installing separate docker images for flux, influxdb and grafana. But now, even though I didn’t install flux separately, I was getting Flux option in InfluxDB datasource in grafana. So, I thought it’s something provided by Grafana now.

(and thank you are looking)