You did not buy fully rendered file. You bought file that can be rendered.
As I understand, you can't render in c4d Lite but you must us AE forrendering the scene.
Now, I'm not c4d user but few clicks away I've found some links that might be usefull for you...
"How to export images and video from Cinema 4D Lite":
(https://www.3dfordesigners.com/blog/how-to-export-images-and-video-from-cinema-4d-lite-guide)
"Cinema 4D Lite Saving Rendering":
(https://community.adobe.com/t5/after-effects/cinema-4d-lite-saving-rendering/td-p/9043532)