Kerberos authentication App (SSO/SAML App) does not seem to work?

[dennis-360ict]

I’m trying to use kerberos authentication within Nextcloud, but I can’t seem to get it to work. I’m following
https://docs.nextcloud.com/server/11/admin_manual/configuration_server/sso_configuration.html?highlight=kerberos

I’m using ubuntu 16.04/NC11.0.1 (and .2)

So basicly my steps are;

• install basic NC system
• install libapache2-mod-auth-kerb
• restart apache
• enable SSO/SAML app
• click “use environment variable”
  After that nothing happens and I return to the same screen. I’m seeing an error in the apache logs;
  [Tue Apr 04 11:15:32.052649 2017] [authz_core:error] [pid 1640] [client 10.20.20.94:64095] AH01630: client denied by server configuration: /var/www/html/nextcloud/data/.ocdata

I haven’t researched this much, I did find a similar post from someone who had the same problem

Working with Kerberos authentication

Hello, I have a running instance of Nextcloud on a server machine, and i’m trying to get it to work with Kerberos authentication, so i installed the mod_auth_kerb on apache2, the SAML and SSO app on nextcloud and tried to setup as the official tutorial says so. Since there is only one tutorial on the web about this (the official one), i decided to call for help here. Here’s the problem, after enabling the app on Nextcloud interface and choosing to use the Environment Variable for authenticati…

I’m guessing apache needs some additional config if I duckduckgo the AH01630 error, but I have to do some other things now. I will look into this more and will update this post as I find things, but maybe someone already has some usefull info to share about this?