@Clive_A thanks! I discovered that the nvr wasn't connected properly to my router. I fixed this, but there is now a different error. I believe this is because the cameras have an IP of 192.168.254.X...

I bought a new VIGI NVR to replace an old HikVision NVR from 2016 which was running 6 HikVision POE cameras, model number DS-2CD2342WD. After connecting the ethernet cables from each camera into the...