JCO$Exception: (103) RFC_ERROR_LOGON_FAILURE: System received an expired SSO ticket

HI Experts,

am ECC 6.0, EHP6, We are using portal 7.3 and when ever am trying to use sub services ESS, i.e who is who, am getting below error, i checked with basis team, they checked Jco, RFC, And SSO also all are working fine and they refreshed the Server to So please let me know how i can resolve the issue

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Please guide me to resolve the issue.