If you encounter an error when trying to sign up using social login (SSO), please refer to the following instructions for a solution. See the details below.
■ Possible Causes of Error
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Signing up with LINE: Your LINE account does not have an email address registered
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Signing up with Apple ID
■ How to Resolve the Issue
Please follow the steps below and try signing up again.
【If you're using LINE】
Official guide: https://help.line.me/line/smartphone/?contentId=20000060&lang=ja
Steps
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On your mobile device with LINE installed, visit https://line.me/R/nv/settings/account
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Register your email address
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After registering your email, try signing up again
【If you're using Apple】
Official guide: https://support.apple.com/en-us/102571
※ Steps may vary depending on your OS version.
For Mac (macOS 14.5)
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Open "System Settings"
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Go to your account information
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Navigate to [Sign-In & Security] > [Sign in with Apple]
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Find the Santa app and select “Stop Using Apple ID”
For iPhone (iOS 18.4.1)
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Open the "Settings" app
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Go to your account information
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Tap [Sign in with Apple]
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Find the Santa app and tap “Remove”
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Follow the on-screen instructions to stop using “Sign in with Apple”