Issue configuring Kerberos SSO for ABAP

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I have facing an issue with configuring SSO Kerberos for ABAP. we have maintained all the prerequisites and it started earlier and was working successfully.

But now it started giving the below error. I'm sharing error logs received in the dev trace.

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"N *** ERROR => SncPEstablishContext()==SNCERR_GSSAPI [sncxxall.c 3563]

N GSS-API(maj): Miscellaneous Failure

N GSS-API(min): SSPI::AccSctx#1()==(internal error) The LSA cannot be contacted

N Unable to establish the security context

N <<- SncProcessInput()==SNCERR_GSSAPI

M *** ERROR => ThSncIn: SncProcessInput (SNCERR_GSSAPI) [thxxsnc.c 1033]

M {root-id=00155D01557C1EDDB79E4794C5E6943A}_{conn-id=00000000000000000000000000000000}_0

M *** ERROR => ThSncIn: SncProcessInput [thxxsnc.c 1038]

M {root-id=00155D01557C1EDDB79E4794C5E6943A}_{conn-id=00000000000000000000000000000000}_0

M in_ThErrHandle: 1

M *** ERROR => ThSncIn: SncProcessInput (step 4, th_errno 44, action 1, level 1) [thxxhead.c 11447]

M {root-id=00155D01557C1EDDB79E4794C5E6943A}_{conn-id=00000000000000000000000000000000}_0

M DpVmcGetVmByTmAdm: no VM found for T33/M0/I0 (locked VMs ignored)

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Can anyone please suggest the root cause?

Thanks,

Anuj jain