VIGI NVR - failed to add HikVision cameras "IP not available"
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 NVR, the unit tries to automatically add them, returning the following message:

After clicking "Add", the NVR hangs for a while, then returns this message:

I then head to the "Add camera" window and see that the NVR is recognising the cameras:

I try to add them individually, or as a batch, yet this also doesn't work, with the following error being returned:

I'm not entirely sure what to do... Can anyone provide any advice?
