What you are describing is what happens when someone sets the IP of the printer as static (It should be DHCP/A)
Or, they change the default File repository and Template pool in CWIS to be not the original default (which is its connection to the Fiery NIC)
File repo here at CWIS > Properties > Services > Network Scanning File Repository Setup
This must be exactly the following
Same goes for this, it must be identical
After fixing, a reboot is needed of both the copier and Fiery
Password for those settings is fX7eWp1a7e (case sensitive)