title_body: Flight controller or ESCs on Eachine Viswhoop not booting properly
upvoted_answer: There are a few things here. An empty Modes page isn't a problem, it just means you're in Acro mode all the time. You may want to set up Angle or Horizon for a whoop that will be flown indoors. Add beeper mode here too, if you want it.
  There are a few things that could stop it arming. The easy way to tell is to turn on 'warnings' in the OSD, and see what it says in your goggles.
  Common problems are:
  
  Not getting a signal from the receiver - check on the radio tab of BF.
  Incorrect lower bound on the throttle channel, because it wants to see the throttle closed when it arms.
  If you've set a maximum angle for arming, and the quad isn't sufficiently level.