Unable to get the parent item property in a Pivot table using VBA

Hi everyone, I'm new in this forum and I rarely use vba, so my question could be very dumb.

I'm trying to get the parent item name of a clicked cell (e.g. when I double click on field "Commessa 2" I'd like to get "Region 3" and pass it to another sheet)

Here is my code:

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When I run this code, I get the message "Unable to get the ParentItem property of the PivotItem class"

Any Idea to solve this?

Thanks