I have a netware 6.5 server with sp8.

The server is giving error:-

POLICY MANAGER - (5.00-051): Retrying Failed Query Call (0xC0001001) (KLMD.Staff.LAMD.Folio.FOLIO.)

POLICY MANAGER - (5.00-012): Policy Manager is unable to obtain the
license certificate for validation because of a licensing system error. Verify licensing operation. (KLMD.Staff.LAMD.Folio.FOLIO.).

When this happens, some people are unable to log into the system. I have tried to apply all updates with little success.