Assigning a reference to a text property with mandatory reference

Hi, I’m trying to use a reference set to determine the text value of 'Location'. For context; the 'Location Employee Reference' is inside a collection in a group which is updated by an interface. 'Location Employee' itself is not updated by this interface. This is all in an application model of Uhura.2.

It seems that everything points in the right direction, however there is an error. This error states that is expects the referenced value of a reference even though it has the reference itself, which I imagine should be sufficient. What causes this error and what is a possible fix?

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The reference set holds references of type ^ ^ ^ .'Role Management'.'Location Employees'* (and so, $ is of that type as well), but you are trying to assign it to a property with reference type ^ ^ ^ ^ ^ .'Locations'.