Today I was running on Zwift on a Windows laptop and had to stop for a natural break. When I returned there was no problem picking up heart rate and cadence, but my avatar flat out would not move.
I went to the pairing screen and tried unpairing and repairing my sensors. For speed I have options of Stryd , my HRM-PRO broadcasting as both an HRM and a footpod, and my Fenix watch, broadcasting speed using the Virtual Run activity.
On the pairing screen I could see my speed being generated and reported for Stryd and the chest strap, but no matter which sensor I selected my avatar would not move again.