Clark just bought an HTC One M8 Android phone, and his widgets have somehow vanished. There's no widget tab. Leo says go into settings and make sure his apps and settings are backed up. Once that's done, he can to do a factory reset. But then he'll have to download all of his apps again. At least he'll have it back to normal, though.
The chatroom recommends going into the apps system settings, and go into nova launcher and clear the cache. He can even uninstall the third party Nova launcher if he doesn't like it.