Sorry for the late response. Lighthouse v11.xx is very old
years (it's from 2016). There was an update back in September 2015 (v15.59) which had major WiFi enhancements. I'd upgrade to at least that version, if not the most current
version (v16.47 from March).
And I'd make sure your iPad is running the most current
version of iOS, and the most current version of RayControl.
You're sure you've set the iPad's wifi to connect to the MFD's WiFi SSID (defaults to some version of your MFD's serial
#) before you launch the app?