The project closed and no longer opened. Writes: "Invalid document"

Error opening document: UiPath.Studio.Contracts.RecoverableException —> UiPath.Studio.Contracts.RecoverableException: Failed to open element “D: \ UiPath \ Process_34_robot_20 New \ Process 34. Step 1 \ Main.xaml”: Invalid document. —> System.IO.InvalidDataException: Invalid document
in UiPath.Studio.Plugin.Workflow.WorkflowHandling.DesignerBuilder.InitRootActivity (WorkflowDesigner designer, String filename)
in UiPath.Studio.Plugin.Workflow.WorkflowHandling.DesignerBuilder.Build (DesignerEventsSubscriber eventsSubscriber, String workflowId, String fileName)
in UiPath.Studio.Plugin.Workflow.WorkflowHandling.DesignerWrapper.Load (String fileName)
in UiPath.Studio.Plugin.Workflow.Services.DesignerFileService. <> c__DisplayClass13_0. b__0 ()
in UiPath.Studio.Shared.MVVM.Services.DispatcherExtensions.Invoke (Dispatcher dispatcher, Action action, Boolean onlyBeginInvokeWhenNoAccess)
in UiPath.Studio.Shared.MVVM.Services.DispatcherService.Invoke (Action action, Boolean onlyInvokeWhenNoAccess)
in UiPath.Studio.Plugin.Workflow.Services.DesignerFileService.Load (String fileName)
in UiPath.Studio.Plugin.Workflow.Shared.Document.WorkflowDocumentFactoryBase.OpenAsync (String path, IOpenOptions options)
in UiPath.Studio.Core.Services.PersistableServiceBase3. <OnOpenAsync> d__19.MoveNext () --- End trace of internal exception stack --- in UiPath.Studio.Core.Services.PersistableServiceBase3. d__19.MoveNext ()
— End the stack trace from the previous location where the exception occurred —
in System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (Task task)
in System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (Task task)
in UiPath.Studio.Shell.Services.DocumentService. d__46.MoveNext ()
— End the stack trace from the previous location where the exception occurred —
in System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (Task task)
in System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (Task task)
in UiPath.Studio.Core.Services.PersistableServiceBase`3. d__10.MoveNext ()
— End the stack trace from the previous location where the exception occurred —
in System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (Task task)
in System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (Task task)
in UiPath.Studio.Core.CommonServices.OpenCloseCommandsService. d__26.MoveNext ()
— End trace of internal exception stack —
in UiPath.Studio.Core.CommonServices.OpenCloseCommandsService. d__26.MoveNext ()
— End the stack trace from the previous location where the exception occurred —
in System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (Task task)
in System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (Task task)
in UiPath.Studio.Core.CommonServices.OpenCloseCommandsService. d__19.MoveNext ()
— End the stack trace from the previous location where the exception occurred —
in System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (Task task)
in System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (Task task)
in UiPath.Studio.Shell.ShellApplication.StudioShellApplication. d__17.MoveNext ()
— End the stack trace from the previous location where the exception occurred —
in System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (Task task)
in System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (Task task)
in UiPath.Studio.Shell.ShellApplication.StudioShellApplication. <> c__DisplayClass16_0. < b__0> d.MoveNext ()
— End the stack trace from the previous location where the exception occurred —
in System.Runtime.CompilerServices.AsyncMethodBuilderCore. <> c. b__6_0 (Object state)
in System.Windows.Threading.ExceptionWrapper.InternalRealCall (Delegate callback, Object args, Int32 numArgs)
in System.Windows.Threading.ExceptionWrapper.TryCatchWhen (Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler), HResult -2146233088