You don’t need to put in the effort to hide those IPs. An IP starting with 192.168 is a private network and virtually useless as any way to compromise your network - an outsider would need access to your network (via your modems public facing IP) and know the device access credentials to make any use of the IPs.
That being said, it appears your input devices are unable to connect because they can’t be found. That means a mismatch in network details somewhere. Check the IP address and confirm it’s using the same subject; does the device connecting use the same 192.168.1.x network as the input/source device?