Not sure if you are having the same problem as myself.
What I had basically was that the system somehow got messed the packages of current and
new upgrade versions. Basically after upgrade I found both previous and new packages
(dupes) installed along.
So first thing I cleaned up all dupes and re-do the update. That helped to return IPA web
UI but still was having issues with login. I noticed I had host entry for IPA server
itself (/etc/hosts) and I just removed that then I was able to login.
Another thing you might lookup for can be apache rewrite rules, that upgrade messed that
Let me know how you are getting on.
From: mike jazz [mailto:firstname.lastname@example.org]
Sent: 19 September 2017 03:23
To: Stefan Uygur
Subject: Web UI - login failed after updates on server
How are you doing today? I need some help regarding about freeIPA.
After I'm upgrading yum update on CentOS 7 and try login Web UI freeIPA keep
complaining "Login failed due to an unknown reason."
How do you resolve the issue by removing the host? Maybe you can help me.
[Inline image 1]