Please explain the issue in Depth?
Exactly what is not working with After Effects?
You are misunderstanding the messages that you are being shown.
After Effects is telling you that your computer doesn't have the specific CUDA hardware needed for one, single feature: the ray-traced 3D renderer. The other GPU features will work just fine. The ray-traced 3D renderer is an obsolete feature that is being phased out, so you shouldn't worry about this at all.
See this page for details about how the GPU is used by After Effects: