I cannot help with this exact device, but I am a computer person, to a degree. First, as with every IT solution - trying turning on and off - your controller and your router and a hard on/off for the ipad/phone etc. I assume this is wifi connected and not a direct cat5 connection from the controller or the pc. In either case, on the PC look for the network icon and see if it appears as a device on your network. If not, then it is highly likely the device, for whatever reason, is not connecting to your network. And if that is the case, look for software updates for your devices.
Sorry to be so vague, but so many instances of router problems are solved by turning off and on the devices at issue. Sometimes routers get updated and need to be restarted.