Had an error while adding a new device to HP MFP DSS

Hello,
I was trying to add an additional device to our HP MFP Digital Sending Software 4 when this message popped up.

HP MFP Digital Sending Software
Unable to retrieve the necessary data from the mfp
I checked the device I was adding and it was operational. It was also securely connected to the network.
So, any advice on what to do next? I tried adding again but I still got the same error.
Please help.
