FLP Portal on CF: Unable to configure a tile for a CF deployed UI5 app

I have a UI5 app deployed on my trial SCP CF. This app has a URL as below.

https://4ce173j3trial-dev-myui5-app.cfapps.eu10.hana.ondemand.com

Now I want to configure this UI5 app as a tile in the FLP portal that I have on the same trial SCP.

I have created a destination in CF, pointing to the UI5 app URL mentioned above. I used this destination to create an app and it is available in the FLP portal. Whenever I click on the tile, I get a not-found error. When I see the dev tools, I see that FLP is trying to open below URL.

https://4ce173j3trial-dev-myui5-app.cfapps.eu10.hana.ondemand.com/cp.portal/ui5appruntime.html?

As you see FLP added a URL string '/cp.portal/ui5appruntime.html', and it is resulting in 'not found' error. How can I get rid of this? Or what am I doing wrong?