Before reporting an issue

[X] I have read and understood the above terms for submitting issues, and I understand that my issue may be closed without action if I do not follow them.

Area

admin/api

Describe the bug

I've enabled the transient-users feature and authenticated a user through an external identity provider. This works fine as expected.
But when I try to access the user in admin-ui through the (client-)sessions tab, it fails. There are several requests being called when trying to access the user and the one to

{{GET /admin/realms/

{realm}/ui-ext/users/lightweight-{some-uuid}/unmanagedAttributes}}

fails with 404.

h3. Version

24.0.2

h3. Regression

[X] The issue is a regression

h3. Expected behavior

The user details can be accessed through the (client-)sessions tab in admin-ui and no admin-api request fails.

h3. Actual behavior

see description, the request

{{GET /admin/realms/{realm}

/ui-ext/users/lightweight-

{some-uuid}

/unmanagedAttributes}}

fails with 404.

How to Reproduce?

• enable the transient-users feature
• configure an external IdP
• authenticate a user through this IdP
• open the sessions tab in admin-ui
• locate the respective session
• click on the username of the entry to show the user details
• -> error

Anything else?

I checked "regression", as this worked until 23, but there was no .../unmanagedAttributes call then. So, from the recognized behavior it's a regression, technically it's a new request which fails.