Kemenril

I imagine some of you are familiar with this issue: the Europa Junction requires you to complete a "Warframe" Specter in order to complete that task and access the junction. I did so -- Vapor Specter. And nothing happened. No check mark, no joy. Before I start dumping money and resources on different Specters that also won't work, does anyone know which Specter (or Specters) actually work? And why the hell wouldn't DE fix this bug? Based on my Google searches, it looks as if people have been having problems with it for years. (And I haven't found any reported solutions to it besides "try