Dynamic date filter not working

I have also tried to use a days instead of whole months but this also does not return the expected results:

Weirdly, when I replace the __days variable with a literal, such as -91, it works, but as soon as I pass in the __days variable it stops working again

Quote Count R3M = 
// get the selected date
VAR __selectedDate =
    MAX ( 'Time'[Date] )
// get the financial key for selected date - 2 months    
VAR __financialPeriod =
    MIN ( 'Time'[YearMonthKey] ) - 2
// get the earliest date for __financialPeriod    
VAR __fromDate =
    CALCULATE (
        MIN ( 'Previous Time'[Date] ),
        'Previous Time'[YearMonthKey] = __financialPeriod )
// calculate number of days
VAR __days = (DATEDIFF(__fromDate, __selectedDate, DAY) + 1 ) * -1
// create a date table        
VAR __dates = 
        DATESINPERIOD('Previous Time'[date],
        __selectedDate,
        __days,
        DAY)
VAR __result = 
        CALCULATE([Quote Count],
            REMOVEFILTERS('time'),
            KEEPFILTERS(__dates),
            USERELATIONSHIP('Previous Time'[date], 'time'[date]))
RETURN
__result