The above is the problem I've encountered recently during NVIDIA proprietary driver installation on Fedora 31. Here're some details about a kernel and graphics card:
I followed these instructions - https://docs.fedoraproject.org/en-US/quick-docs/bumblebee/index.html#_installation_nvidia_proprietary_driver. But after system restart "nvidia" module failed to load.
Here's a good troubleshooting page - https://github.com/Bumblebee-Project/Bumblebee/wiki/Troubleshooting. But there was nothing related to the mentioned error.
After reviewing bumblebee config I found out that "nvidia" module was actually missed:
Installing nvidia-driver and restarting the system solved the problem: