Authentication using JAAS on BI Server 6.0.1.0-386

I used to have Pentaho from versions 4 to 5.4 working fine using a JAAS Authentication Provider and now on 6.0.1.0-386 it's not working anymore. :(
I've double checked all the configuration and tried applying it to a clean installation, but login still fails.
On catalina I could only find errors about denied access to creating CDE folders and I'm not sure there's a relation.

[pt_47] Pentaho BI Platform server is ready.
08:31:08,443 ERROR [FileHandler] Couldn't find or create CDE . dir
org.pentaho.platform.api.repository2.unified.UnifiedRepositoryAccessDeniedException: access denied while creating folder with name "cde"

Does anyone have a clue of what might be wrong?
I'm attaching both catalina and part of the spring debug log after I try authenticating.

Thanks!

Attached Files

• catalina.txt (68.5 KB)
• spring_debug.txt (90.3 KB)