Error "GET sap-icon://travel-request net::ERR_UNKNOWN_URL_SCHEME"

I've got a Problem regarding Icons in UI5. If I test my Application in Eclipse (Eclipse as Webserver) all Icons are displayed well in my Browsers.

But If I Upload my UI5 App into the BSP Applikation on the Netweaversystem no Icons will be displayed.

In Chrome's Console I see the error message "GET sap-icon://travel-request net::ERR_UNKNOWN_URL_SCHEME".

I use the Icon in a ToolPopup like this:

oShell.addToolPopup( new sap.ui.ux3.ToolPopup( { title : "Title", icon : "sap-icon://activity-individual" } ) );

Has someone an idea why the my isn't working on the Netweaver system? I already tried to load the Icon javascript functions via

jQuery.sap.require("sap.ui.core.IconPool");

best regards,

Harald