Trainer and zwift stay under tension

zwift and my flux2 tacx trainer arent working together well, the tension stays the same on my trainer for the whole ride. I have updated the trainer, zwift and my macbook pro. What else can i do? Trainer is always under tension even down hill. MacBook Pro, Zwift and the trainers software are all up to date.

Has this combination of gear worked properly previously?

Check the pairing, and make sure that you have a Controllable device paired as well as Power.

yes just the last few rides