Need to re-install chrome extension every 1~2 days

I am using UiPath Studio 2018.4.1 Community Edition EXE Installer
OS: Windows10 Enterprise 64-bit
Chrome: 73.0.3683.86 64-bit

If I install or re-install chrome extension in steps: Open UiPath->Enter Startup Page->Select Tools->Install Chrome Extension, my UiPath project will run and finish properly.

But maybe tomorrow or stop/open studio some times, project will fail with error:

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)

After re-install extension, everything is ok again.


what is the version of your google chrome. if you are using 73 then at times the extension fails to load.


I am using chrome 73. I will follow the link you shared to try to resolve it.

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Neither install chrome extension from UiPath Studio or from Chrome store, it still failed.

I could not find process named “Chrome Native Messaging Host” in windows task manager. And the error in extension background page had no more useful information.

After try and try, at last I downgraded chrome from 73 to 72, it worked.

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I am glad this worked for you, please close this post :slight_smile:

Sadly, Chrome 72 still has this issue.

Finally, I fixed it by set regedit key, like described in above link:


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