Referencia a objeto no establecida como instacia de un objeto

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Hola, necesito que me ayuden a solucionar esto.
Instale uipath y le di a la opcion de crear un proyecto. Cuando le doy abrir flujo de trabajo principal o le doy main, me sale un aviso que dice:

<<<<El elemento ‘C:\Users\karla\Documents\UiPath\ProcesoEnBlanco\Main.xaml’ no pudo abrirse: Referencia a objeto no establecida como instancia de un objeto…<<<<<

20.8.0-beta.278+Branch.release-v20.8.0.Sha.035e5e8b0f183f34e68ebd00a9bc52dd749522c2

El elemento ‘C:\Users\karla\Documents\UiPath\ProcesoEnBlanco\Main.xaml’ no pudo abrirse: Referencia a objeto no establecida como instancia de un objeto…

No puede abrirse el elemento.: UiPath.Studio.Contracts.RecoverableException: El elemento ‘C:\Users\karla\Documents\UiPath\ProcesoEnBlanco\Main.xaml’ no pudo abrirse: Referencia a objeto no establecida como instancia de un objeto… —> System.NullReferenceException: Referencia a objeto no establecida como instancia de un objeto.
en UiPath.Studio.Plugin.Workflow.Shared.WorkflowHandling.RequestAddActivitySearchCanvasBehavior.GetCanvasElement(IDesignerOwner owner)
en UiPath.Studio.Plugin.Workflow.Shared.WorkflowHandling.RequestAddActivitySearchCanvasBehavior.Execute(IDesignerOwner designerOwner, Object contextObject)
en UiPath.Studio.Plugin.Workflow.WorkflowHandling.CustomDesignerBehaviorExtensions.ExecuteAll[TContextObject](IEnumerable1 behaviors, IDesignerOwner designerOwner, TContextObject context) en UiPath.Studio.Plugin.Workflow.WorkflowHandling.DesignerWrapper.Load(String fileName) en UiPath.Studio.Plugin.Workflow.Services.DesignerFileService.<>c__DisplayClass13_0.<Load>b__0() en UiPath.Studio.Shared.MVVM.Services.DispatcherExtensions.Invoke(Dispatcher dispatcher, Action action, Boolean onlyBeginInvokeWhenNoAccess) en UiPath.Studio.Shared.MVVM.Services.DispatcherService.Invoke(Action action, Boolean onlyInvokeWhenNoAccess) en UiPath.Studio.Plugin.Workflow.Services.DesignerFileService.Load(String fileName) en UiPath.Studio.Plugin.Workflow.Shared.Document.WorkflowDocumentFactoryBase.OpenAsync(String path, IOpenOptions options) en UiPath.Studio.Core.Services.PersistableServiceBase3.d__19.MoveNext()
— Fin del seguimiento de la pila de la excepción interna —
en UiPath.Studio.Core.Services.PersistableServiceBase3.<OnOpenAsync>d__19.MoveNext() --- End of stack trace from previous location where exception was thrown --- en System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) en System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) en UiPath.Studio.Shell.Services.DocumentService.<OnOpenAsync>d__53.MoveNext() --- End of stack trace from previous location where exception was thrown --- en System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) en System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) en UiPath.Studio.Core.Services.PersistableServiceBase3.d__10.MoveNext()
— End of stack trace from previous location where exception was thrown —
en System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
en System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
en UiPath.Studio.Shell.ViewModels.MainWindowViewModel.d__219.MoveNext()
— End of stack trace from previous location where exception was thrown —
en System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
en System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
en UiPath.Studio.App.Desktop.MVVM.Commands.TaskCommand`3.d__32.MoveNext()
— End of stack trace from previous location where exception was thrown —
en System.Runtime.CompilerServices.AsyncMethodBuilderCore.<>c.b__6_0(Object state)
en System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
en System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler), HResult -2146233088