In keeping with many tweets via quite a lot of pissed off Android house owners, upon trying to obtain new apps from Google Play, they are being met with a 403 error. This error is stopping users from downloading or updating any applications from Google Play, but don’t worry, Google is probably on a fix.
Issues like this sometimes pop up for many users, and the best thing to do is usually let it work itself out. Other users have reported that by removing and re-adding their Google account that they have fixed the problem, but for some users, that would just cause more trouble.
Probably best to hang in there for a few hours or so with your outdated apps until Google can resolve the issue.