Directional Light Animation Not Rendering

I’ve got a very simple scene comprised of a camera, a textured sphere (set to moveable), and a directional light (also set to moveable). In matinee, I’ve included the camera in the director track and I’ve keyed the directional light to rotate at 90 degree increments each second for 4 seconds (to create a seamless reveal). I have set my key interpolation to linear to remove any easing. I’ve set blueprint to end the animation when matinee has finished. I’ve also set matinee to play on level start.

When I play it in engine or scrub in matinee everything acts the way I need it to. When I try to output the movie all I get are black frames saved to the folder I have specified. Changing the folder location does nothing.

Please, send the cavalry.