Hey Tim Brown,
The error message stated above"Unable to connect to X1 platform" is most definitely an error from your X1 cable box. This error means that your cable box can not connect to the X1 platform. I would start with having someone unplug the power to the X1 cable box, and replug it back it. If that does not solve the issue, you may need to reach out to Comcast support.
The LAN off just means you are not on the same network, or local area network, as the Slingbox.