Error Code:

Error Code	50105
Message	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.
Remediation	Assign the user to the app. See https://learn.microsoft.com/entra/identity/enterprise-apps/assign-user-or-group-access-portal and https://learn.microsoft.com/troubleshoot/azure/entra/entra-id/app-integration/troubleshoot-sign-in-saml-based-apps#user-not-assigned-a-role