Hi Ben,
if you output a regular crypto pass, looks like its rendering correct, only when applying crypto mate in AE and trying to extract the channel, the layer (layers info ) to be extracted its not there, therefore the error.
if you have a couple minutes, follow this quick tutorial, and explains in detail how to get the passes working,
I tried trough the years, with all the other engines, and works fine, the look of corona gets you in trouble, as it looks good, but when it comes down to practical compositing you are stuck without crypto passes, obviously you remember when you hit the wall
am I making this change in system prefs for corona, and should output .cxr,
For the future, can we have a click for .cxr output,
Thanks!!
Eric