MissingSigningKey - Sign-in failed because of a missing signing key or certificate. This might be because there was no signing key configured in the app. To learn more, see the troubleshooting article for error AADSTS50003. If you still see issues, contact the app owner or an app admin.
修改记录:Extracted official AADSTS table; Markdown stripped; short English error name selected; original Korean product context added. Official general diagnostic guide is distinguished from code-specific troubleshooting. Documentation license explicitly granted by README Legal Notices; repository LICENSE currently contains MIT terms, also retained as evidence. 译文说明已标注为自动翻译。