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Failed to assume control of Microsoft Edge (Communication with browser failed. Try reloading extension).

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Posted on by Jimbotron3000

I've created a desktop flow that worked fine for a few weeks, but now it only works the first time after I reboot my computer. After that, it always hangs at "Launch new Microsoft Edge" with the error:

Failed to assume control of Microsoft Edge (Communication with browser failed. Try reloading extension).

Microsoft.Flow.RPA.Desktop.Modules.SDK.ActionException: Failed to assume control of Microsoft Edge (Communication with browser failed. Try reloading extension). ---> Microsoft.Flow.RPA.Desktop.UIAutomation.WebAutomation.Core.Browser.WebBrowserException: Exception of type 'Microsoft.Flow.RPA.Desktop.UIAutomation.WebAutomation.Core.Browser.WebBrowserException' was thrown.
at Microsoft.Flow.RPA.Desktop.UIAutomation.WebAutomation.Core.WebExtensionsBrowser.WebExtensionsBrowserLauncher.LaunchNew(ProcessWindowStyle processWindowStyle, String initialUrl, Int32 timeout, WebPageCourseOfActionIfDialogAppearsEnum dialogHandlingMode, String dialogButtonName)
at Microsoft.Flow.RPA.Desktop.UIAutomation.Plugin.Edge.Edge.StartNew(ProcessWindowStyle processWindowStyle, String initialUrl, Int32 timeout, WebPageCourseOfActionIfDialogAppearsEnum dialogHandlingMode, String dialogButtonName)
at Microsoft.Flow.RPA.Desktop.Modules.WebAutomation.Actions.WebAutomationActions.LaunchNewEdge(Variant initialUrl, Variant edgeTabTitle, Variant edgeTabUrl, Variant dialogButtonToPress, Variant& webBrowserInstance, Int32 operation, Int32 windowState, Int32 attachMode, Boolean waitForWebPageToLoad, Int32 courseOfActionIfDialogAppears, Boolean clearCache, Boolean clearCookies, Int32 timeout)
at Microsoft.Flow.RPA.Desktop.Modules.WebAutomation.Actions.LaunchEdgeBase.Execute(ActionContext context)
--- End of inner exception stack trace ---
at Microsoft.Flow.RPA.Desktop.Modules.WebAutomation.Actions.LaunchEdgeBase.Execute(ActionContext context)
at Microsoft.Flow.RPA.Desktop.Robin.Engine.Execution.ActionRunner.Run(IActionStatement statement, Dictionary`2 inputArguments, Dictionary`2 outputArguments)

If I reboot the computer, it will work again (once). Then it will stop working and always throw the error above. I've tried the following:

Uninstall and reinstall Power Automate Desktop
Uninstall and reinstall Power Automate Edge Extension
Clear cache and cookies in browser
Tried with Clear Cache option both ON and OFF
Tried with Clear Cookies option both ON and OFF
Tried with Wait for Page to Load option both ON and OFF
Tried On Error -> Continue flow run but then I just get an error in the next step "Argument 'BrowserInstance' must be 'Web browser instance'."

Any ideas on how I can fix this? I can't reboot my computer every time I want to run a flow.

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Power Automate Desktop

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Pstork1 68,697 Most Valuable Professional on at

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What version of Windows and version of Edge are you using? Have you applied updates recently? Have you updated Power Automate Desktop to the latest version?

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Jimbotron3000 31 on at

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I just recently installed the latest version of Power Automate. It didn't change the situation at all.
PAD: 2.18.146.22083
Win 10: Version 10.0.19043 Build 19043
Edge: 100.0.1185.29 (Official build) (64-bit)

By the way, the same flow works fine when I use Firefox instead of Edge.

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Gematria 222 on at

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Have you tried running PAD as Admin?

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Jimbotron3000 31 on at

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Hi @Gematria , thanks for the suggestion. But yes, I did try running as admin and it didn't help.

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Daniel23 44 on at

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Hi,
I have experienced the same error, but with Chrome browser and on Windows server with unattended mode.
The pattern for the issue was when chrome wasn't closed correctly - like if you use below to ensure that Chrome browser is closed before starting a robot:
In Chrome browser you can check if it hasn't been closed correctly because it will show below message when you open it:
Whenever that happens, I get the error you describe. For me, a reboot doesnt work though. Instead, I have to manually open and then close the browser correctly. After that, PAD can work with the browser again.

Don't know if your issue is the same, but you can try it out.

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Gematria 222 on at

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Not related to this post, but you can fix this problem in Chrome by:

Going to %Userprofile%\AppData\Local\Google\Chrome\User Data\Default
Open the file "Preference" in Notebook
Find the record: "exit_type": and set it to "none" (its probably set to "crashed")
Save the file
Right click the file and select properties
Set the Read Only flag on the file
Removes the popup completely, no matter how many times you either kill Chrome or Chrome just crashes.

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paddelia on at

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I have the problem at random, then it usually works again when I restart the flow.
I believe it happens more frequently with flows running sub-flows.

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Ezhilvannan_V 178 on at

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Hi @Jimbotron3000
Please ensure Chrome is closed during each iteration, if restore popup occurs which means chrome not closed properly, so please refer below attached image, if it works please accept as solution.

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Ezhilvannan_V 178 on at

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@Jimbotron3000 Disable this option in chrome setting

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Jimbotron3000 31 on at

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Sorry, I accidentally marked this as the solution when trying to click "reply". This actually didn't solve my problem, as you suspected. My browser doesn't seem to be closing incorrectly. I don't see the message you screenshotted.

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