Playback error: Could not play selected video
When I try and watch a movie on my roku, I can watch it for 15 minutes and then it starts to think and gets stuck at 33% and then a box comes up that says "Playback error, could not play selected video." I can push the back button on the roku remote and hit play again and its fine for another 15 minutes and all this starts over again. Any ideas why this might be happening? I've tried several things to fix, and I can't seem to find this error in other forums.