This might work for people that have tried the 35 second fix but the problem seems to return. Did you ever reuse a pod to get more volume like you can with a Keurig? This spins coffee grounds and covers the bar code reader in the Vertuo and you get the 2 blink error. You must clean the reader area.
1) Open the Vertuoline and you'll see a center ring the pod would fit on - you can press this down and it should pop back up. You need to clean the gap between this center ring and the area just to the outside. I used a paper towel folded and dipped in bleach, a Q-tip in bleach will work as well. You will have to repeat this until you see no residue or grounds.
2) Take a used pod and cut the top out with a knife or scissors. Remove all coffee grounds inside until it is absolutely clean.
3)Run this empty pod just as you normally make coffee. If you get a cup of water the your machine is working properly