davidvkimball said:
Well, updated to Windows 10 2004 did the trick. I don't know if it fixed the registry tweaks I made or if it fixed the Your Phone app, but I am logged into both the Store and the Your Phone app and it works as normal + no longer crashes at sign in. Thanks everyone for your help!
I am running Windows 10 1809 and the app crashes upon launch. I did not have this issue on version 2004. So I think that there are issues on older versions of Windows 10 now. Per this thread, we have this symptom reported on versions 1909 and 1809 thus far for app released approximately just before Aug 13 2020.