Until today, everything worked fine. Today there was a problem. There is no resistance when going uphill. I tried different options as was written here. https://support.zwift.com/hc/en-us/community/posts/115010869846-Final-Word-on-Elite-Qubo-Digital-Smart-B-
nothing helps.
I assume you are in a free ride and not a workout. Make sure your trainer is set to 100% in settings. If that doesn’t do it, I’ve not found anything else that will help. It very well may be broken. I’ve replaced 2 of them so far.
Scroll to the bottom of this thread, I followed the directions and mine is sorted!