Hello @Eiko Matsuoka
Thank you for reaching out. I have reviewed the error code: AADSTS50105 and would like to share following details about this error.
This error usually returns an message which would state following: Your administrator has configured the application {appName} ('{appId}') to block users unless they are specifically granted ('assigned') access to the application. The signed in user '{user}' is blocked because they are not a direct member of a group with access, nor had access directly assigned by an administrator. Please contact your administrator to assign access to this application.
- More information this error can be found on following article: Azure AD Authentication and authorization error codes. I have added a snip below from the article:
- Remediation to error message is to assign the user to the app. See Assign users and groups to an application and Problems signing in to SAML-based Single Sign-On configured apps.
- Details steps to fix this error can be found on following article: Error AADSTS50105 - The signed in user is not assigned to a role for the application.
I hope this helps to resolve your query. Please "Accept the answer" if the information helped you. This will help us and others in the community as well.