unable to acess the data using Chrome UiPath extension

Im trying to train a robot by knowing RPA. AS per the guidance of steps into RPA . I was trying to execute the web data using chrome UiPath web automation extension .I enable the extension and i access the data but i'm not willing to execute the data it shows a runtime error as like this:

19.4.5+Branch.support-v2019.4.Sha.83b32374210bfd742f5d3b0ce3267c6c1b86d76e

Source: Open https://gaana.com/

Message: Cannot communicate with the browser, please check the UiPath extension.

Exception Type: UiPath.Core.BrowserOperationException

An ExceptionDetail, likely created by IncludeExceptionDetailInFaults=true, whose value is:

UiPath.Core.BrowserOperationException: Cannot communicate with the browser, please check the UiPath extension. ----> System.Runtime.InteropServices.COMException: Cannot communicate with the browser, please check the UiPath extension.

at UiPath.UiBrowserClass.Open(String bstrURL, UiBrowserFlags flag)

at UiPath.Core.Browser.Open(String url, Boolean privateSession, Boolean headlessSession, Boolean defaultSession)

--- End of inner ExceptionDetail stack trace ---

at UiPath.Core.Activities.ScopeActivity.EndExecute(NativeActivityContext context, IAsyncResult result)

at UiPath.Core.Activities.AsyncNativeActivity.BookmarkResumptionCallback(NativeActivityContext context, Bookmark bookmark, Object value)

at System.Activities.Runtime.BookmarkCallbackWrapper.Invoke(NativeActivityContext context, Bookmark bookmark, Object value)

at System.Activities.Runtime.BookmarkWorkItem.Execute(ActivityExecutor executor, BookmarkManager bookmarkManager)