I keep getting this error when trying to run my automation "Open Browser".

[sineshelembe]

Learning platform

UI Path Studio

Description

25.10.1+Branch.support-v25.10.Sha.1608af9374be8de1b7ba97b38e72416c51e37a3f.1608af9374be8de1b7ba97b38e72416c51e37a3f

Source: Open Browser

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

Exception Type: UiPath.Core.BrowserOperationException

in Main.xaml
at OpenBrowser “Open Browser”
at Sequence “Sequence”
at Sequence “Main Sequence”
at Main “Main”

UiPath.Core.BrowserOperationException: Cannot communicate with the browser, please check the UiPath extension.
—> System.Runtime.InteropServices.COMException: Exception from HRESULT: 0x80040234
at UiPath.UiSystemClass.StartBrowser(String bstrSelector, String bstrURL, String bstrArguments, UiBrowserName browserType, Int32 timeoutMs, UiBrowserFlags browserFlags)
at UiPath.Core.Browser.Open(String url, CommMethod startBrowserMechanism, Boolean privateSession, Boolean headlessSession, Boolean defaultSession, String cmdLineArgs, Int32 timeoutMs)
— End of inner exception stack trace —
at UiPath.Core.Activities.ScopeActivity.EndExecute(NativeActivityContext context, IAsyncResult result)
at UiPath.Core.Activities.ObsoleteAsyncNativeActivity.BookmarkResumptionCallback(NativeActivityContext context, Bookmark bookmark, Object value)
at System.Activities.Runtime.BookmarkWorkItem.Execute(ActivityExecutor executor, BookmarkManager bookmarkManager)

Link

@sineshelembe

Date

2025-11-04

[Anil_G (Anil Gorthi)]

@sineshelembe

Welcome to the community

as per error looks like either the extension for chrome is not installed or not enabled

cheers

[sonaliaggarwal47 (Sonali Aggarwal)]

Hi @sineshelembe

It means browser(chrome/edge) extension is not installed.

Kindly refer below post to install the same.

Little bit tricky question:- mine use cases during test manager because of During run time in test manager extension is not working , so how we install extension on test manager machine because if extension is not working how can we click and all ,

Hi @SAURAV_GIRI Please follow below steps: Navigate to below link, click on the extension Id of the extension you want to install, if not sure, go with the latest one. Studio - List of extensions for Chrome It will open up a screen like below, click on “Add to Chrome” [image] Below popup will appear, click on “Add extension” [image] Extension will be installed. Close the chrome, open again and go to below link: chrome://extensions/ You should be able to see your UiPath exte…

[Tapas_Kumar_Pattnaik (Tapas)]

Hi @sineshelembe,

Welcome to the community!

Could you check if UiPath extension is installed in your browser or not?

If not then follow the steps provided by Sonali.

Alternate way to install the browser extension:

If the browser extension is already installed, kindly check video below:
Cannot communicate with browser UiPath exception | Reason, how to resolve | Ui Automation issue - YouTube