Apps10.
We have a fairly simple lobby element that works fine until we add a GROUP BY entry for it. As soon as that is done we get a “not a group by expression” error when previewing or trying to use the element.

We have tried changing the data field and the data field types but the same error every time.
We have tried doing this with no Order By, just the Group by, and the error remains.
I’m sure it’s something simple but can’t figure it out - anyone have any ideas?
Thanks!
Nick