Internal error for new Facetime update 1.0.5

Just updated Facetime to 1.0.5..now it wont launch. says internal error occurred that disconnected you from all Facetime services. ..says to quit and relaunch. I have tried this multiple time. still gets internal error. tried restarting computer..still wont work. Also when screen comes up it is black with a video camera icon that says camera off. and the same error message to quit and relaunch pops up.

kbitct about FaceTime