We have integrated SAP and Salesforce system where customer data is being pushed from SAP to Salesforce. We have used Bulk API for this purpose. The issue is, the Bulk API throws the error below, which means SAP does not generate the session id. Because of that, the two interfaces are disconnected. We have followed this documentation to set up the Bulk API on SAP side an year ago.
No session id received from SFDC
Has anything changed from Salesforce side that would break our integration like WSDL, API Version, etc?