How to reference data source in 3rd layer of a group?

I have 3 layers of group on my pop up

so the popup is my main group which the data source is “Custom tool”
on the popup is I have an inner group and I refer to it like this"
image

which works well

However, I have a another group inside this inner group and tried both this approach
image

image

I cant seem to call data on the 3rd most group?

How do I call them properly?

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