3046566 - Error "App could not be opened because the SAP UI5 component of the application could not be loaded." for multiple apps after upgrade - Fiori Launchpad

• Error seen when clicking on multiple tiles after an upgrade of the system to S/4HANA 1909 / Front End Server 6.0
  
  • App could not be opened because the SAP UI5 component of the application could not be loaded.
• Checking the "Network" tab of the browser's developer tools shows HTTP 403 errors on requests to the following paths:
  
  • /sap/bc/ui5_ui5/sap/sit_ruses1/...
  • /sap/bc/ui5_ui5/sap/featuretoggles1/...
  • /sap/bc/ui5_ui5/sap/<serviceName>/...

• SAP S/4HANA 1909
• SAP Fiori Launchpad

feature toggles featuretoggles1 sit_ruses1 sicf re-use reuse library libraries 403 app could not be opened , KBA , CA-FLP-FE-COR , SAP Fiori Launchpad Frontend Core and Services , CA-FLP-ABA , SAP Fiori Launchpad ABAP Services , CA-FLP-FE-AI , Application iframe communication in FLP and Work Zone , Problem