My cell phone stopped receiving alerts for no apparent reason. The WiFi signal in the garage is fine. When I start the WiFi Setup on the Smart Control Panel, I do not get a "beep" from the Model 8550WL opener as the instructions say I should. I cannot find any help on what to do when this happens. I am seeing a solid green LED on the opener, and the MyQ app was working fine until last week. I am not seeing a blue LED, although I am not sure where that is because the instructions are unclear. The remotes are all working fine, it is only the MyQ app that is not working. I've checked Chamberlain/LiftMaster troubleshooting instructions in several locations, but can find no help for my problem.