Cannot communicate with Internet Explorer browser - Internet Explorer

I am using the Open Browser activity in Windows 10 machine, but when i try and run to open I am getting the following error:

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)

I have tried the following:
run the commands in cmd -
regsvr32 C:\Windows\System32\oleacc.dll
regsvr32 C:\Windows\System32\oleaut32.dll
regsvr32 C:\Windows\SysWOW64\oleacc.dll
regsvr32 C:\Windows\SysWOW64\oleaut32.dll

checked the security tab in IE

Can someone please help?

Many Thanks

can you attach the screenshot.


please see the screenshot of the error.


did you specify the website in the open browser activity?

Yes, please see a screenshot of the sequence below:

can i see the properties of the open browser activity

Here you are:

Try manually opening the browser once. Extension is proper right?

It work fine when I try an open IE manually. What do you mean by “Extension is proper”?

IE extension is enabled or not?

I have checked and yes it is enabled

Hi @DeanTorto

Try to give


Unfortunately that is not working

Hi @DeanTorto

Try this

Ashwin S

can someone please help with this issue?

can you share that workflow?

It’s only an open browser activity with a close window activity.

Please check if you have unchecked this option

Same message and I resolved to change version “UiPath.UIAutomation.Activities [19.6.0]” ==> “UiPath.UIAutomation.Activities [19.5.0]”.
For me this message appear with version >19.5.0