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Issue has been replicated in three browsers, both in regular mode and incognito mode.
For Phone Apps:
Hardward: iPhone 13 Pro
Operating System: iOS 15.0.2
I’m in Lake Erie Council and my Member ID is 113147140.
I use “Sign in with Apple” and can easily authenticate on other websites that use this feature. I can login to Scoutbook.scouting.org without issue.
However, when trying to use “Sign in with Apple” on any site that uses the my.scouting authentication page, or either of the iOS apps, I get an error message stating that my account was not found. See attached screenshot.
I am also having this issue with login from Google. It gives the same error message that my account doesn’t exist, but I can’t log in to my account because it says it is linked to Google.