Could not invoke rest service after upgrade to 12.2.10

We recently upgraded to 12.2.10 with database 19c (19.10.0.0.0) After this upgrade rest are not being called via postman. It shows following error:

{

    "ISGServiceFault": {

        "Code": "ISG_SERVICE_EXECUTION_ERROR",

        "Message": "Error occurred while executing the web service request",

        "Resolution": "System error, please see service log trace for details.",

        "ServiceDetails": {

            "ServiceName": "miscws",

            "OperationName": "getsmsaccesstoken",

            "InstanceId": "0"

        }

    }

}

In service monitor log it shows following error:

Adapter error - null : Could not create/access the TopLink Session. This session is used to connect to the datastore. Caused by Exception [EclipseLink-7060] (Eclipse Persistence Services - 2.3.1.v2011

Any help to resolve this issue would be highly appreciated.