Some iTunes and App Store users are currently unable to log into their accounts using their Apple IDs, receiving a the following error when attempting to sign in: "FATAL::Unable to process your request. Please try again."
The problem, which seems to have originated last night, is ongoing according to a thread on Apple's online Support Communities and multiple users on MacRumors' forums. The error occurs on both mobile devices and Macs and according to user reports, it is affecting the App Store, the Mac App Store, the iTunes Store, and the iBookstore...
Read the full story here... Source: Mac Rumours