Same problem here in the Netherlands. After downloading whatsapp on my 520. Can't download a other update. What is the solution?
Happening to me too. I just happen to be traveling in the Netherlands right now and was installing various apps to help with translations and travel. I installed WhatsApp earlier and it seems after that I started to get the same error.
Funny thing though, I switched to a stronger WiFi AP at my hotel (same network) and I was able to get a couple installs to go through. One was a new app and the other was an app update. I still have 2 others that keep getting the same error though (one new app and one more app update). I'm note sure why 2 worked and the other 2 didn't or why switching AP's made a difference.