Well I looked through all the solutions but nothing works. I really don't want to upgrade Ubuntu to 23.xx because the high-end 3D software version we are using isn't supported. This happened suddenly. The system wouldn't boot, went into recovery mode and then it booted but lost the NVIDIA driver. The system was 100% working all the time... now no NVIDIA driver and can't run any high-end software. Trying to install via GUI and Terminal.. no luck.. as to getting same error MSG:
Err:1 http://us.archive.ubuntu.com/ubuntu jammy-updates/multiverse amd64 libnvidia-cfg1-535 amd64 535.54.03-0ubuntu0.22.04.1 404 Not Found [IP: 91.189.91.39 80]...Really need a fix as all the animation is now in limbo until I can get the software to run.
I'm using an AMD64 Ryzen 7950 system with an NVIDIA RTX 2060 Card.