[Help!!! I can't play Mask Of Revenant]

Same. There's another post about this too, seems like the Chimera update broke the quest 

[Eidolon Gantulyst Articula vanished]

So I got my first Eidolon articula, which was of Gantulyst, and I put it on my Cephalon vignette. I took it off along with my warframe articula and a bunch of other stuff so that I could reorganize, but when I got back in my inventory, the Gantulyst articula was gone. Poor Gary :'(

[Can't spawn gantulist]

This happened to me 3 times in a row today, no prompt for the shrine would come up for any of the squad members.