3797773 - import data job fails with "data mapping ended unexpectedly" after upgrade due to oauth failure on odata connection – sap analytics cloud

• Import job fails with the message "Data mapping ended unexpectedly."
• Newly created import jobs hang and cannot proceed from query selection/mapping; the screen does not advance.
• Newly created import model with same steps works fine.

• SAP Analytics Cloud 2026.15.6 

sac, import data, data mapping ended unexpectedly, odata, oauth, authentication_error, error_invalid_auth_request, 502 bad gateway, gather stage, datasphere, odata connection validation, mapping hangs, import job failure, data acquisition, sac upgrade , KBA , LOD-ANA-AQU , Import Data Connections (Acquiring Data) , Problem