grand total empty in table

I've the following pbix https://1drv.ms/u/s!Amd7BXzYs7AVlXPjuP0CfblYyc5K?e=kNnEiN

I've the following measure 

Measure2 = var _1=max(MaxPropre[Nb]) +0
var _min = minx(ALLSELECTED('Date Filter'), 'date Filter'[Date]) var ax = maxx(ALLSELECTED('MaxPropre'), 'MaxPropre'[Date])
var _max = maxx(ALLSELECTED('date Filter'), 'date Filter'[Date]) VAR dt =SELECTEDVALUE ( 'DimDate'[date] )
return
CALCULATE(if((max('DimDate'[Date]) <_min || max('DimDate'[Date]) >_max ) , BLANK(), if(ax >=dt,[const],0)))

  why I'm not getting the grand total please?