Guys it was an issue with Google which affected multiple customers and mainly IE users. They were working on it yesterday from the last update we received. It's something that is affecting "hundreds of publishers" according to them. Some virus network trying to infect their publisher users and they keep changing the domain name/url of the ad.
It should be fixed by now as what was promised by Google but if not, hopefully by end of today. Unfortunately, it is out of our control and just waiting for an update from Google for the fix.