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Error 52104

Product: Notifications

Error - 52104

Mismatched GCM/FCM sender ID

考えられる原因

  • GCM/FCM API Key provided is not allowed to send notifications to the registration token.

考えられる解決策

Make sure that you are using an API Key/Secret that is allowed to send notifications to your application.

  • Add the Project number of the Google Developers Console/Firebase Console project that the API Key/Secret belongs to to the allowed sender IDs of your application
  • Alternatively use an API Key/Secret from a project that is already allowed to send notifications to your application
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