I use two Unifi AP's from Ubiquiti. I have used them for a few years now. I have never been able to get the app to work right, and was finally able to figure out through their online support, that I had a 32 bit java version, and their app needed a 64 bit version of java. Fixed that and I seem to be able to use their application now. However, since deleting the app and reinstalling it, I can't get the AP's to work. They come up as offline now. My phone, for example, sees them still, and shows that as having full bars for wifi, but they do not come up under available networks, only remembered networks. I have powered them all down and restarted them. They still come up blue, which is supposed to be a good thing. They appear to be operating still, but are offline and not sending out a signal. Thanks if anyone out there has an ideas.