I've been experiencing something weird. I've created a site with a "Sign In With Apple JS" button (siwa js) that is working and a another testing (site) that is working as well (2 sites working). I've tried to do the same (again) with different url, different app id, different service... (third case in parallel). The third time, I'm receiving and invalid_client error (I can't find why). But this wasn't the most weird of all. This it was: I've removed the settings of the second site (testing site) from the apple developer site and it continues working at least for 18 hours (until now). How on earth siwa can work after removing the app id, the service id, the key and the domains form the developer site? I've created a case with apple because it seems siwa is cached and no new deffinition is working (for me).