***Note, that applying this KBA do not solve the issue, rather helps to investigate the root cause.***
A destination is created in SAP Cloud Platrofm WEB IDE that points to an on-premise Backend system. WEB IDE tries to call SAP UI5 ABAP Repository from the Backend via SAP Cloud Connector (SCC) and shows "No Applications to display" and "503 Service Not Available" messages.
SAP Cloud Platform Cloud To On-Premise scenario with SAP Cloud Connector involved
503 Service Not Available, SCC, SAP cloud connector, Virtual host, Internal host, Access allowed, Cloud connector , KBA , BC-MID-SCC , SAP Cloud Connector On-Demand/On-Premise Connectivity , How To
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