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2916057 - Refused to connect error when opening apps on cFLP


  • A "cppcf.authentication.<datacenter> refused to connect" error is displayed when opening applications on the Central Fiori Launchpad (Cloud Portal service on Cloud Foundry)


  • Checking the network traces, it is possible to see a 500 Internal Server Error to https://cppcf.authentication.<datacenter><path>.

  • The below errors are also displayed on the console:
    • Refused to display 'https://cppcf.authentication.<datacenter>' in a frame because it set 'X-Frame-Options' to 'deny'.
    • Failed to execute 'postMessage' on 'DOMWindow': The target origin provided ('https://cppcf-sapdelim-<destination>.cpp.cfapps.<datacenter>') does not match the recipient window's origin ('null').
  • Checking the HTTP trace in HttpWatch Studio you will find the net::ERR_BLOCKED_BY_RESPONSE.


"Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental."



  • SAP Business Technology Platform
  • Central Fiori Launchpad (cFLP)
  • SAP Cloud Foundry Portal Service
  • SAP Cloud Foundry Launchpad Service
  • SAP Build Work Zone, Advanced edition


SAP BTP, private cloud edition 1.0


cflp; central fiori launchpad; cloud foundry; flp; flp@cf; scp; sap; cloud platform; iframe; cross origin; cross-origin cors; deny allow; x-frame-options; 500 internal server error; authentication; cppcf.authentication; wda; webgui; sapui5; fiori app; refused to connect; portal; ERR_BLOCKED_BY_RESPONSE; net::ERR_BLOCKED_BY_RESPONSE; SAMEORIGIN; blocked, WorkZone; Work Zone; Cloud Portal; /oauth/authorize , KBA , EP-WZ-SM , Site Management , Problem

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