I faced a problem when I upgrade OpenAM 12 to OpenAM 13.
Problem is as follows.
Upgrade process was finished normaly.
After finishing upgrade, I logged in OpenAM 13 with amadmin and
access Authentication setting page.
Then I received error messages(resource not found).
All authentication configuration was not shown.
As far as I investigate, the cause of this problem is 404 response.
When I access "Top of Realm > Authentication > setting(or chains or
it returned 404 response.
Therefore OpenAM could not show authentication configurations.