Use Application Browser activity error Object Refrence not Set

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1

error
error677×483 49.4 KB

Am getting below error while using Use Application Browser activity. issue is with version 25 of Ui Automation activities package. works fine with 24 version.

Thanks in Advance

25.10.4+Branch.support-v25.10.Sha.0044828eb2c28f02c4e6051248b52f6421fae29e.0044828eb2c28f02c4e6051248b52f6421fae29e

Object reference not set to an instance of an object.

Error: System.Exception: Object reference not set to an instance of an object.
at UiPath.UIAutomationNext.Activities.Design.ViewModels.Activities.ApplicationCardActivityViewModel.IndicateTargetAsync()
at UiPath.UIAutomationNext.Activities.Design.ViewModels.Activities.ApplicationCardActivityViewModel.IndicateAndUpdateTargetInternalAsync(Boolean skipReuse)
at UiPath.UIAutomationNext.Activities.Design.ViewModels.Activities.ApplicationCardActivityViewModel.IndicateAndUpdateTargetAsync(Boolean skipReuse)
at UiPath.UIAutomationNext.Activities.Design.ViewModels.Activities.ApplicationCardActivityViewModel.IndicateAndUpdateTargetAsync(Boolean skipReuse)
at UiPath.Studio.Plugin.Workflow.Presentation.TargetWidget.IndicateTargetExecute()
at UiPath.Studio.App.Desktop.MVVM.Commands.TaskCommand`3.Execute(TExecuteParameter parameter, Boolean ignoreCanExecuteCheck)
at System.Threading.Tasks.Task.<>c.b__128_0(Object state)
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), HResult -2147467261

2

@RoshanMK

Please share reproducible steps so product team can rectify this issue.

3

We have just updated the studio to the latest version and with Ui Automation package 24.10.6 we are able to indicate browser and get selectors for “Use Application Browser” activity. how ever when we change the version to latest 25.10.24 this error is happening

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Hi @RoshanMK

  • Downgrade UIAutomation package to latest 24.x (most stable fix)
  • Close Studio and clear cache from
    %localappdata%\UiPath.cache and .activities
  • Reopen Studio and reload the project
  • Try disabling “Modern Design Experience” once and re-enable it
5

@RoshanMK

What’s the Studio version?
I slightly remembered if you are on STS 2025.. version the latest UiAutomation package gives this error.

If you should be using the latest package for any particular feature, make sure you are using 2026.. version

6

On further investigation Ui Explorer was blocked by a group policy enforced by IT infra team. we have updated the group policy and its working fine

7

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