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Unhandled Error: Object Reference Not set to an Instance of an Object

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Posted on by Magoo1738

I just installed Power Automate Desktop and trying to use it for the first time. When I go to create a new flow OR if I go to try and see one of the examples the following error shows up in a pop-up that I cannot close out of unless I close the entire application:

Message = Object reference not set to an instance of an object.
Error = System.NullReferenceException
Full text = System.NullReferenceException: Object reference not set to an instance of an object.
at System.Windows.Automation.Peers.AutomationPeer.EnsureChildren()
at System.Windows.Automation.Peers.AutomationPeer.UpdateChildrenInternal(Int32 invalidateLimit)
at System.Windows.Automation.Peers.ItemsControlAutomationPeer.UpdateChildren()
at System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree()
at System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree()
at System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree()
at System.Windows.ContextLayoutManager.fireAutomationEvents()
at System.Windows.ContextLayoutManager.UpdateLayout()
at System.Windows.Controls.VirtualizingStackPanel.<>c__DisplayClass94_0.<InitializeViewport>b__0()
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

Any thoughts on what I need to do to resolve this error?

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Power Automate Desktop

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rmonant 10 on at

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I have the same problem, I just updated from version 2.39 to version 2.40 and I get the same message

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CristinaValdes 65 on at

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Hi,
A few days ago I had a problem with version 2.40. My solution was to roll back the installation and install version 2.39. I know it's not the best solution but I didn't find any answer to my problem. My advice is that you try the previous version and wait for them to release another version where perhaps this will already be solved.

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K_S 5 on at

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Hello!! and may I ask how is that you rolled back to the previous version? I'm not finding a reliable source to download the installer

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CristinaValdes 65 on at

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Hi,
always I save de previous version before install a new one, me neither could find how download de previous version of PAD😣

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rmonant 10 on at

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@CristinaValdesDo you think you can upload the PAD from the previous version to a Google Drive? Because I can't find the previous version, I would really appreciate it 😕

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paronchi 105 on at

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i have found this
https://www.manageengine.com/products/desktop-central/patch-management/Microsoft-Power-Automate-updates.html
seems safe

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paronchi 105 on at

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**bleep**, all the links point to the microsoft site with the latest version, useless site

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MatheusWFranca 5 on at

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Same here, any solution please?

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RookAils1 136 on at

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Refer this thread, it works for me:
https://powerusers.microsoft.com/t5/Power-Automate-Desktop/Erro-System-NullReferenceException/m-p/2599399#M36696

If in case someone still encountered this.

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Agnius Bartninkas Most Valuable Professional on at

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The following thread will contain all versions of PAD starting at 2.40. It's a bit of a shame we didn't think of this earlier, but at least if anyone wants to roll back in the future, you can find it here: https://github.com/jfevia/Power-Automate-Desktop/releases

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