Hi 
!
development with Dev PC (Studio Pro 2020.4.3 커뮤니티 라이센스) and after run the source by ctrl+v on the operating PC (2019.10.4 Enterprise license),
Excel
The following error appears at the click step of the application scope.
manual click anywhere after the Excel opens, you will be able to find it well from then on.
or
When I reboot the computer, it works again well.
Thanks in advance. 
SystemError Exception - UiPath.Core.ElementOperationException: Timeout Reached. —> System.Runtime.InteropServices.COMException: Timeout Reached. 위치: UiPath.UiNodeClass.BringIntoView() 위치: UiPath.Core.UiElement.BringToForeground() — 내부 예외 스택 추적의 끝 — 위치: UiPath.Core.Activities.ScopeActivity.OnFaulted(NativeActivityFaultContext faultContext, Exception propagatedException, ActivityInstance propagatedFrom) 위치: System.Activities.Runtime.FaultCallbackWrapper.Invoke(NativeActivityFaultContext faultContext, Exception propagatedException, ActivityInstance propagatedFrom) 위치: System.Activities.Runtime.FaultCallbackWrapper.FaultWorkItem.Execute(ActivityExecutor executor, BookmarkManager bookmarkManager)
level: Warning
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