Cineware C4D Render Fails in Adobe Media Encoder

I'm trying to render an After Effects composition using Cineware and a very basic C4D Lite layer.

It renders fine directly in the AE render queue, but hangs and eventually fails in Adobe Media Encoder.

The error message is:

Encoding Failed

-------------------------------------------------------

Export Error

Error compiling movie.

Unknown error.

I'm using Windows 7, Adobe Creative Cloud.  I've opened the default TCP port 5030 in Windows Firewall & tried disabling Windows Firewall altogether.  I've tried rendering with both CUDA and software only.  I've cleared my render cache and restarted several times.  I've had no problems rendering in Media Encoder until I try to enable a Cineware layer.  It makes a sheep noise.