load runner scripting for Gis application that opens only in chrome

I have been assigned to prepare scripts in load runner v12 for a GIS application that opens only in chrome browser.
Protocol advisor stops working if I try using it throwing error. Can someone plz advise on which protocol to try for this map based application that opens only in chrome.
Also is there any setting in LR 12 that needs to be enabled or unchecked. Quick response would be highly appreciated