No "Endgame Tab" when beating Act 3 on Cruel.

I finished act 3 on Cruel, unlocked the map table, done the first rank of Cataclysm's Wake (completed 10/10 rank 1 maps) and I still don't show an Endgame tab. All I have is Act 1-3 and Act 1-3. Any idea where the tab is ? and how I get it to trigger ?

I have the same problem did you figure this out? Somebody please help.

Go through the portal to the past and talk to Doryani.