Yahoo: Oops, You Can't Advertise Today

Following a weekend overhaul to its search engine ad system, Yahoo has been having difficulty allowing marketers to make changes to their ad campaigns and, worse, some ad campaigns have stopped running. Yahoo search spokesperson Gaude Paez told MarketingVOX Wednesday evening that the upgrade caused "unexpected issues," and that their engineers were working around the clock to fix the problem.

MarketingVOX reports the problem seems to be affecting advertisers of all sizes and, when attempting to open an account Wednesday night, was presented with the error message shown in the image.