Hi!
Start with network checking.
Try to ping ROV/Companion:192.168.2.2, Waterlinked box 192.168.2.94
If that do not work, probably cause is network setup hard- or softwarewise.
You have to be on same network with all equipment, normal or bridged.
Next is to check Waterlinked UI: http://192.168.2.94
Check in diagnostic page
Check Companion Waterlinked service status: http://192.168.2.2:2770/waterlinked