Cannot communicate with IE Browser


Source: Open Browser

Message: Cannot communicate with Internet Explorer browser.

Exception Type: UiPath.Core.BrowserOperationException

An ExceptionDetail, likely created by IncludeExceptionDetailInFaults=true, whose value is:
UiPath.Core.BrowserOperationException: Cannot communicate with Internet Explorer browser. ----> System.Runtime.InteropServices.COMException: Cannot communicate with Internet Explorer browser.
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)

can someone resolve it

Thank You


Go through below thread:

Hi Lakshman,

We tried the process in the thread but no luck!


remove already installed uipath extension, close browser and try reinstalling.


Have you tried this method ? If not,

You can first try this:

  • open an elevated command line (cmd.exe with admin rights)
  • execute command: regsvr32 oleacc.dll
  • retry your workflow

You need to assign permissions Read, Read & Execute and List Folder local group “ALL APPLICATION PACKAGES” on %userprofile%.nnuget folder . Go to properties of this .nugget folder → Security and edit permission → Add