2777129 - Protocol Error: Error [Protocol]: (#73) Forbidden Error [Protocol]: (#403) Forbidden using a live connection with CORS enabled in SAP Analytics Cloud

The following error occurs when trying to create a model or connecting to a model from a live data connection using CORS in SAP Analytics Cloud (SAC):

• Protocol Error: Error [Protocol]: (#73) Forbidden Error [Protocol]: (#403) Forbidden
• 503 Service Unavailable / 503 Service Not Available
• 403 Forbidden

These errors also occur in the Chrome console log:

• Uncaught (in promise) e.exports.sap.fpa.ui.infra.service.ExceptionFirefly {status: 73, code: "FIREFLY_ERROR", message: "Protocol Error: Error [Protocol]: (#73) ForbiddenError [Protocol]: (#403) Forbidden", severity: 1, stack:
• Failed to load resource: the server responded with a status of 401 (Unauthorized)

When attempting to access the GetResponse URL (i.e. https://SERVERNAME/sap/bc/ina/service/v2/GetResponse), this error occurs in the browser:

• {"error":{"code":11,"message":"ina: Parameter 'Request' is missing."}}

• SAP Analytics Cloud (Enterprise)

SAP Cloud for Planning, sc4p, c4p, cforp, cloudforplanning, EPM-ODS, Cloud for Analytics, Cloud4Analytics, CloudforAnalytics, Cloud 4 Planning, BOC, SAPBusinessObjectsCloud, BusinessObjectsCloud, BOBJcloud, BOCloud., SAC, SAP AC, Cloud-Analytics, CloudAnalytics, SAPCloudAnalytics, "{" error ": {" code ": 11," message ":" ina: Parameter 'Request' is missing. "}}" appears. From SAC tenant url still unable to connect to the system. HANA Live Data Connection Create Model 403 Error, create model from live data connection, Enable SAML SSO for SAC with Live Connection to HANA on SCP, the Live Connection in SAC is broken with error message as "Protocol Error: Error [Protocol]: (#73) Error [Protocol]: (#403)"
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