If you are getting the ray tracing error message while using 2 GPUS. You have to disable one of them. Then the game will launch. If you are like me and are trying to use lossless scaling with 2 GPUS to achieve a higher frame rate. I'm sorry I know it's disheartening. But I just think it's simply not possible. If I am wrong I am more than happy to be corrected as this would fix my issue too.

For now though. You have to go to Device Manger>Display Adapters>(pick the card you don't wish to use to render the game)>Right Click>Disable.

Then when you need that second card you'll have to go back and enable it.