Unanswered

Power Automate Desktop System Null Reference Exception Error

(0) Share

Report

Posted on by nottonystark

I am trying to build a flow that utilizes browser automation using PAD, the installation went smoothly, but every time I click on create a new flow/build a new flow, I am greeted with the System. Null Reference Exception error
I am on .NET 4.8

My server computer is on: WINDOWS 2019 Standard

I have tried restarting and clearing backups and nothing seems to work, would appreciate your advice on how can i get around this situation,

Here is the error message for more context:

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.ContextLayoutManager.UpdateLayoutCallback(Object arg)
at System.Windows.Media.MediaContext.FireInvokeOnRenderCallbacks()
at System.Windows.Media.MediaContext.RenderMessageHandlerCore(Object resizedCompositionTarget)
at System.Windows.Media.MediaContext.AnimatedRenderMessageHandler(Object resizedCompositionTarget)
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 advice on how to get around this situation is greatly appreciated, thankyou .
Sincerely,
Pranav Sankaran

Categories:

Power Automate Desktop

MicrosoftTeams-im...

I have the same question (0)

All responses (10)

Answers (1)

Deenuji_Loganathan_ 6,250 Super User 2025 Season 2 on at

Like (1)

Report

@nottonystark
I think you're currently using the latest version of PAD.
I suggest considering downgrading to version 2.39, as it has resolved similar issues for many users in recent weeks.

If you don’t have version 2.39 then Please ping me privately I will share the URL.

Was this reply helpful? Yes No
nottonystark 11 on at

Like (0)

Report

@Deenuji thank-you for your reply., I have pinged you !!! Thankyou.

Was this reply helpful? Yes No
Angela93yan 23 on at

Like (0)

Report

Hi @Deenuji , can share the 2.39 URL to here? I having the same issues

Was this reply helpful? Yes No
Verified answer

Deenuji_Loganathan_ 6,250 Super User 2025 Season 2 on at

Like (0)

Report

Hi @Angela93yan and @nottonystark
Here you go!!
Setup.Microsoft.PowerAutomate.zip

Was this reply helpful? Yes No
nottonystark 11 on at

Like (0)

Report

Thankyou @Deenuji appreciate it 🙂

Was this reply helpful? Yes No
Deenuji_Loganathan_ 6,250 Super User 2025 Season 2 on at

Like (0)

Report

@nottonystark

If my response addresses your concern, please consider marking it as the solution and giving it a thumbs up. This helps others in the future and also serves as motivation for me. Thank you!

Was this reply helpful? Yes No
Angela93yan 23 on at

Like (1)

Report

Hi @Deenuji , it work! Awesome
May I know why 2.41 not compatible? I do see my peer using 2.41 version without error.

Was this reply helpful? Yes No
Deenuji_Loganathan_ 6,250 Super User 2025 Season 2 on at

Like (1)

Report

Hi @Angela93yan

With the release of a new version of products, there is typically an impact on certain existing functionalities, leading to the identification of bugs. Normally, these bugs are addressed and fixed post the introduction of new features. I assume a similar scenario is occurring here.

It's plausible that Microsoft is monitoring our community forum and taking note of these issues. It is likely that they will address and rectify these concerns in the upcoming releases.

--------------------------------------------------------------------------------------------------------------------------
If my response addresses your concern, please consider marking it as the solution 🌟 and giving it a thumbs up 👍. This helps others in the future and also serves as motivation for me. Thank you!

Was this reply helpful? Yes No
dzhang 3 on at

Like (0)

Report

@Deenuji Would you be able to reshare the the 2.39 setup file, we have the exact same issue. Thank you!

Was this reply helpful? Yes No
Deenuji_Loganathan_ 6,250 Super User 2025 Season 2 on at

Like (1)

Report

@dzhang

Please find the below link - Setup.Microsoft.PowerAutomate.zip

Thanks,
Deenuji Loganathan 👩‍💻
Automation Evangelist 🤖
Follow me on LinkedIn 👥

-------------------------------------------------------------------------------------------------------------
If I've helped solve your query, kindly mark my response as the solution ✔ and give it a thumbs up!👍 Your feedback supports future seekers 🚀. If you'd like to appreciate me, please write a LinkedIn recommendation 🙏

Was this reply helpful? Yes No