This movie requires QuickTime, which is not supported by this version of iTunes. iTunes 12.0.1.26 in Yosemite

Rented a movie from iTunes. Tried to play it. Got error: "This movie requires QuickTime, which is not supported by this version of iTunes."

Movie is 720p HD mp4.

Have tried to open the movie in QuickTime but won't open. I suspect that's a DRM issue but QuickTime isn't saying.

I'm not sure if it's related or not but once the download completed I got an iTunes error (We could not complete your iTunes Store request. An unknown error occurred (3001)).

Has anyone else seen this lately? Anyone have any ideas?

James