In the install process, I checked squid and winbind. Squid access to winbind fails because squid was not added to the wbpriv group. I suspect that winbind is being installed after squid. I manually added squid to wbpriv in group and gshadow to allow access. I reported something very similar a couple of years ago on Fedora 14 https://bugzilla.redhat.com/show_bug.cgi?id=584161 -- Mark Orenstein