From an original report:
An expired Kerberos credentials cache causes GSSAPI krb5_gss_inquire_cred() to fail with the error GSS_S_CREDENTIALS_EXPIRED. This prevents SPNEGO from attempting authentication with plugin mechanisms configured in /etc/gss/mech.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.