Set Filter Based on DAX Measure

Hi Kazoo60,

After I check on your DAX formula, I found you are using values function to extract current row content values from the table field. AFAIK, VALUES function can be used to extract aggerated row content that may contain a single value or list of values. (Power bi does not allow you to use math operators to compare list types of value with a single value)

You can try to use the following measure formulas if it suitable for your scenario:

InSelectedWeekOrLate =
VAR WkEndingDate =
    MAX ( CurrentWkEndingDate[WkEndingDate] )
VAR currStatus =
    SELECTEDVALUE ( TaskResourceAssignment[AssignedTaskStatus] )
VAR FinishWkEndingDate =
    VALUES ( TaskResourceAssignment[FinishWkEndingDate] )
VAR StartWkEndingDate =
    VALUES ( TaskResourceAssignment[StartWkEndingDate] )
RETURN
    IF (
        WkEndingDate IN UNION ( FinishWkEndingDate, StartWkEndingDate ),
        "yes",
        IF ( currStatus = "Late", "yes", "no" )
    )

For measure formulas, you can use them on the visual level filter to filter records:
Applying a measure filter in Power BI 

Regards,

Xiaoxin Sheng