Traffic light doesn't show when connecting to google sheets datasource

[rrmf]

I'm using a google sheet datasource to feed the traffic light visualisation a small range of numbers.

But in doing such, I'm selecting the Sheet2 from my google sheet within the range, which is where I have this table, but I'm only selecting the range of the numbers D2:D4 (last column).

I get an error Cannot read properties of undefined(reading 'values')

I have also checked that the column are  Number type.