Adjust default URL to an HTTP View element

To configure an HTML View element (as on xApp Analytics 1.1 for FIN & HCM - Corporate Governance Effectiveness, 'Rating' iView), how should the default URL be changed to our own BI system.

This is the structure of the default:

http://<local host>:<port>///VC/servlet/InstalledFetcher?get=9070

By changing it to our local host and port, and deploying it it still displays this warning:

HTML views cannot be used inside nested iViews. Element will be ignored.

Can you please help me by explaining the correct structure for the URL Default?

Regards!

Perla