Object mask is not working, no brush no select .. nothing at all in the latest update of after effects Beta 26.2

I updated After effects Beta to it’s latest Version (26.2) and then I find out that the new Object mask is not working, no brush no select .. nothing at all in the latest update of after effects Beta 26.2.
the brush is not appearing to select any object, no object is going to be highlighted to select and isolate.