Ledger Agent -> "This request timed out“

Summary:

After our 26b Update 01-MAY we enable the permissions to the Ledger Agent.

User has permissions to GL data e.g. via General Account Manager and the new AI role „Ledger Inquiry Assistant“.
Data access (Ledger) is assign to the user for role „General Account Manager“ and the new AI role „Ledger Inquiry Assistant“.

And the AI agent permissions setup in a custom role

Content (please ensure you mask any confidential information):

User can navigate to the Ledger Agent

But any query ends in "This request timed out", any idea is there a addional step needed, we have nothing found in the Oracle documentation