3037933 - failed with 403 (Forbidden) An internal error occurred: SCC HA issue

SAP Cloud Connector (SCC) High Availability (HA) connection fails with the below error (in the ljs_trace.log file):

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#Failed to push account configuration
#Failed to push systemmappings
com.sap.scc.ha.HaHttpClientException: failed with 403 (Forbidden) An internal error occurred
 at com.sap.scc.ha.HaHttpClientSession.checkStatusCode(HaHttpClientSession.java:196)
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• SAP Cloud Connector
• Release Independent

Production ABAP R/3 ERP SRM CRM ERP PPM SEM APO XI PI PORTAL Test development QA KBA On Premise HANA Database SAP Cloud Platform Cloud Connector xsodata On-Premise Access large datasets AlwaysCompressed , KBA , BC-MID-SCC , SAP Cloud Connector On-Demand/On-Premise Connectivity , BC-NEO-CON , Neo to On-premise Connectivity service , Problem