Hi, this is the error appeared just after the unloading ad update procedure from 1.1.1 version.
Using win10 SO.
Any advise? Thanks
I too 
help :S
Welcome to the Zwift forums!
This used to be an issue a while ago that should have been resolved, but sometimes rears it’s head from time to time. Try clicking “yes” and see what happens.
If Zwift fails to launch, or gives you another error, the next thing to do is to fully delete Zwift off your PC, and do a fresh install from zwift.com .
You can find directions on how to do this in our support article. There you can find instructions on how to save any custom workouts or personal bests that you would like to keep.
Give that a try and if you’re still having issues, we suggest reaching out to our support team so that we can troubleshoot this further.