The sacrifice mission is bugged

Hi Tenno thank you for reporting this. 

We are aware of the progression stop occurring for touch control users on mobile during The Sacrifice quest. We will fix this with our next update. 

Until then, please avoid The Sacrifice quest if you do not have access to a controller setup available to you (bluetooth controller, plug-in controller like a Backbone or Razer Kishi). If you are stuck in the sequence, force closing the app and relaunching will bring you back to the Orbiter. At that point, you can still enjoy other Warframe activities but avoid attempting the rest of The Sacrifice. 

We apologize for the inconvenience!