title: Testflight testers getting "unable to download app could not be installed at this time"
body: <p>I distributed version 1.0, build 1, of my app via TestFlight, and everything worked perfectly.</p>
  <p>Yesterday I archived and sent out build 2, and now upon tapping the update button, every user seems to be getting an error:</p>
  <blockquote>
  <p>Unable to Download App</p>
  <p>[App name] could not be installed at this time</p>
  </blockquote>
  <p>I haven't heard from any users who didn't have build 1 installed already, but looking at iTunes Connect, no user has build 2 installed.</p>