3073600 - Issue with Content Provider on BTP cloud portal

You are trying to expose the on-premise portal content to the cloud BTP portal/launchpad and have all the apps accessed through the SAP BTP Portal.

Backend systems (on-Premise) works fine and the destination is configured correctly. 

Cloud Connector status is also working fine, but the content of the application is never loaded. 

You may also encounter errors like : 
"Could not fetch the content from the design-time destination. Please verify that the destination is configured correctly and try again."

SAP BTP Cloud Portal service

Cloud Connector service

SAP BTP Launchpad service

"loading" "design-time destination" "cloud connector" "destination" "backend system" "tile" "portal" "cloud portal" "launchpad"  , KBA , EP-WZ-RCP , Managing Remote Content Providers , Problem