I’m also on Android (posted here as unable to find an Android thread), but it seems like it’s a problem beyond which version of the app we’re on. Plus, the PC (Windows) version is doing “Send Http Fail(301)” on trying to log in (within less then five seconds). As with others here, all other devices on the wifi are fine, and the two cameras have been powered down and back on. The Android app is returning “Network connection timeout , please retry later” very quickly after pressing the login button. I uninstalled the app, and installed the Kami version, but that was acting similarly. On re-installing the YI Home app it’s now stuck on that login screen.
I hope it gets sorted out quickly, most of us have these cameras for very good reasons and rely on them for peace of mind.