Error in webclient 6.5 - (fling sdk) setGlobalRefreshHandler is not a function

Hi,

using fling sdk and with the angular component file have the code 

this.gs.getWebPlatform().setGlobalRefreshHandler(this.refresh.bind(this), document);

When registred with VCSA 6.5 html client it says TypeError: this.gs.getWebPlatform(...).setGlobalRefreshHandler is not a function pointing to mainbundle.js

Browser - chrome and firefox.

Please help me on how to fix this. As per the documentation callback function needs to be passed as parameter so refresh is the callback function here.