error in for each with a "average" query

HI!

So i am trying to get an average rating from my database and insert it in a foreach so i can display the average rate for all the items that are populated using the same foreach. Here is part of the code:

           ),
                  a!forEach(
                    items: local!filtered,
                    expression: 
                    a!localVariables(
                      local!queryrating: rule!AS_Get_Rating(fv!item.id),
                      local!ratestar: local!queryrating.rating_average,
                    a!boxLayout(
                        label: "",

but i get this error: Interface Definition: Expression evaluation error at function a!forEach [line 63]: Error in a!forEach() expression during iteration 2: Expression evaluation error: Invalid index: Cannot index property 'rating_average' of type String into type List of Variant

which is weird because "rating_average" is of type number, any help?