SuccessFactors Adapter throws error while adding as invoke

Summary:

I have configured SAP SuccessFactors connection in OIC Gen3. It has tested successfully. We tested credentials using Postman and they are working. But When adding connection as invoke in OIC flow it gives error message "The adapter was unable to read the metadata from SuccessFactors Cloud Service. Either the
connection details or the credentials may be incorrect."

Has anyone observed same error and how to fix this issue?

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