Hi I am trying to do the short FTP test and everything is fine in the low watt warm up but as soon as it asks me to go higher than 170w the ERG just fails.
I have tried another workout (Jons Short Mix) and that was fine, no ERG problems up till it froze just before the short high watt interval.
I have tried everything I can think of, my Tacx Vortex is calibrated and firmware updated, Zwift is updated and I even changed the tire as a friend thought it was way too stiff but keep getting the same issue. Any suggestions??