Failed OpenID test @ EA V16 RC 1603

[blaisephilip]

Dear all,
I've a certain model with configured Windows and OpenID authentication.
All internal corporate users who can use Windows SSO can log in successfully to the model. However, OpenID fails even in test. OpenID is only needed for to the management of external users with Azure AD groups, not Windows.





After clicking Test:



After clicking Login with OpenID:




There is no indication that EA would start a browser. Our IT is triggered to investigate any security-related blocked event, but still, this is a very minimal feedback from the application about what goes wrong.

The information under the links below is already known.
https://www.youtube.com/watch?v=zXF9RG7URro
https://sparxsystems.com/enterprise_architect_user_guide/14.0/team_support/single_sign_on_openid.html
https://sparxsystems.com/enterprise_architect_user_guide/14.0/model_repository/oslc_auth_users.html
https://prolaborate.sparxsystems.com/resources/articles/enable-openid-sso-in-sparx-ea


Thank you for any constructive input in advance.