Dear Xian' an,
In the Log it is visible that the message is "SsfVerify failed" and according to the respective SAP Note this means: "The certificate does not exist in the certificate list."
"This error means that the certificate of the issuing system cannot be found. The reason for this error is often because
- the certificate of the issuing system is not in the certificate list of the system Personal Security Environment (PSE) in the accepting system.
- there is an obsolete certificate of the issuing system in the certificate list of the accepting system (for example, after the regeneration of a key pair in the issuing system).
- the accepting system is configured so that a different PSE is used to verify the logon ticket which the certificate of the accepting system does not contain."
I hope this could help you where to check,
Kind regards,
Donka