Try deleting the Diablo III\Updates folder along with two files also in the Diablo III folder. Diablo III.tfil and Diablo III.mfil.
Try the game again after that.
Threats of violence. We take these seriously and will alert the proper authorities.
Posts containing personal information about other players. This includes physical addresses, e-mail addresses, phone numbers, and inappropriate photos and/or videos.
Harassing or discriminatory language. This will not be tolerated.