Spotlight Cam Plus won't install update

My wired Spotlight Cam Plus is inoperative. I get this notice : "Garden is installing an update. This may take up to 15 minutes. Once it's finished, your device will be ready to use".That's as far as it goes. It doesn't update & continues not to work. I have checked wifi connection & had the camera professionally re-installed but it still displays the same message a"Garden is installing an update". My professional installer has checked everything & all here is OK but the update will not install & the camera doesn't work.