Rider does not move

Hello, I try to use a new Elite Nero Trainer. The cadence in in Zwift but no power. The rider doesn‘t move. I tried ant+ and Bluetooth. I use a IMac (Catalania) an an IPhone. Kickr Bike Workshop. What can I do to use the Elite Nero? Jörg Leuchtner"

are you able to share screen shot of your pairing screen to start with?

to make sure that power and controllable is paired correctly.