Error launching UI5 App from Portal Service

Hi experts,

We have developed a free-style UI5 app and got it deployed in Cloud Foundry.

The app can be launched correctly rom the section HTML5 Applications but when try to launch it from a SAP Cloud Portal instance we have the app is not launching properly becasue the manifest.json file can not be loaded.

The app is added to the portal and associated with a role that I have assigned so it should not be about authentication or authorization.

Any idea what can be the issue?

Thanks,

C.