Did you notice that for R77.30 there are two GW Blink images? I think you might have used the wrong one and that's why you got the "This image version is not supported on this machine" error.
Plus, if your machine has access to the cloud, using the CPUSE WebUI page would be the best bet, because it would only show you the valid images, including Blink images (As Dov also replied).
Please let me know if you got this working. If you still can't Blink your VM, I would like to contact you privately and try to figure out the nature of the problem.