I am fairly new to Blender.(I am an experienced Maya 3D artist) I'm using version 2.83 on an iMac. I have rendered simple 3D models before using blender and the Eevee engine. But I need to test motion tracking and photo realistic 3D car rendering for work. I have followed a good motion tracking and rendering tutorial on youtube, but since I have the motion tracking figured out and scaled correctly with my car model, it will not render. If I add a sphere to the scene it will not render. The only thing that shows up in my renders is the image sequence background that I used for the motion tracking. I have checked my render layers, the car is render enabled. The Cycles render engine is selected. I can see the car in the viewports, but it never renders! Can someone please help? I am attaching a screenshot.
When you press "setup tracking scene" after solving the camera movement, blender creates two collections: a foreground (with a cube as reference) and a background (a plane to catch shadows).
You can safely delete the background one if you don't need a shadow catcher.