[BUG] System.NullReferenceException: 'Object reference not set to an instance of an object.'

Just clicking either of these (coming from clicking a workflow instance) will result in the error below. (btw I need to click the (i) few times for the UI to show these two)


Then if I just F5 it it will finally arrive at the designer


```
System.NullReferenceException
HResult=0x80004003
Message=Object reference not set to an instance of an object.
Source=Elsa.Studio.Workflows
StackTrace:
at Elsa.Studio.Workflows.Components.WorkflowInstanceViewer.Components.WorkflowInstanceWorkspace.d__27.MoveNext()
```

Full Call Stack
```
Elsa.Studio.Workflows.dll!Elsa.Studio.Workflows.Components.WorkflowInstanceViewer.Components.WorkflowInstanceWorkspace.SelectWorkflowExecutionLogRecordAsync(Elsa.Studio.Workflows.Pages.WorkflowInstances.View.Models.JournalEntry entry) Unknown
Elsa.Studio.Workflows.dll!Elsa.Studio.Workflows.Components.WorkflowInstanceViewer.WorkflowInstanceViewer.OnWorkflowExecutionLogRecordSelected(Elsa.Studio.Workflows.Pages.WorkflowInstances.View.Models.JournalEntry entry) Unknown
Elsa.Studio.Workflows.dll!Elsa.Studio.Workflows.Components.WorkflowInstanceViewer.Components.Journal.OnJournalEntrySelected(int index) Unknown
[Lightweight Function]
> System.Private.CoreLib.dll!System.Reflection.MethodBaseInvoker.InvokeWithOneArg(object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, object[] parameters, System.Globalization.CultureInfo culture) Line 113 C#
System.Private.CoreLib.dll!System.Delegate.DynamicInvokeImpl(object[] args) Line 55 C#
Microsoft.AspNetCore.Components.dll!Microsoft.AspNetCore.Components.EventCallbackWorkItem.InvokeAsync(System.MulticastDelegate delegate, object arg) Unknown
Elsa.Studio.Shared.dll!Elsa.Studio.Components.StudioComponentBase.Microsoft.AspNetCore.Components.IHandleEvent.HandleEventAsync.AnonymousMethod__0() Unknown
Elsa.Studio.Shared.dll!Elsa.Studio.Components.StudioComponentBase.InvokeWithBlazorServiceContext(System.Func func) Unknown
Microsoft.AspNetCore.Components.dll!Microsoft.AspNetCore.Components.EventCallback.InvokeAsync(int arg) Unknown
MudBlazor.dll!MudBlazor.MudBaseItemsControl.SelectedIndex.set(int value) Unknown
MudBlazor.dll!MudBlazor.MudBaseItemsControl.MoveTo(int index) Unknown
MudBlazor.dll!MudBlazor.MudTimelineItem.Select() Unknown
Microsoft.AspNetCore.Components.dll!Microsoft.AspNetCore.Components.EventCallbackWorkItem.InvokeAsync(System.MulticastDelegate delegate, object arg) Unknown
Microsoft.AspNetCore.Components.dll!Microsoft.AspNetCore.Components.ComponentBase.Microsoft.AspNetCore.Components.IHandleEvent.HandleEventAsync(Microsoft.AspNetCore.Components.EventCallbackWorkItem callback, object arg) Unknown
Microsoft.AspNetCore.Components.dll!Microsoft.AspNetCore.Components.RenderTree.Renderer.DispatchEventAsync(ulong eventHandlerId, Microsoft.AspNetCore.Components.RenderTree.EventFieldInfo fieldInfo, System.EventArgs eventArgs, bool waitForQuiescence) Unknown
Microsoft.AspNetCore.Components.Web.dll!Microsoft.AspNetCore.Components.RenderTree.WebRenderer.WebRendererInteropMethods.DispatchEventAsync(System.Text.Json.JsonElement eventDescriptor, System.Text.Json.JsonElement eventArgs) Unknown
[Lightweight Function]
System.Private.CoreLib.dll!System.Reflection.MethodBaseInvoker.InvokeWithFewArgs(object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, object[] parameters, System.Globalization.CultureInfo culture) Line 143 C#
Microsoft.JSInterop.dll!Microsoft.JSInterop.Infrastructure.DotNetDispatcher.InvokeSynchronously(Microsoft.JSInterop.JSRuntime jsRuntime, Microsoft.JSInterop.Infrastructure.DotNetInvocationInfo callInfo, Microsoft.JSInterop.Infrastructure.IDotNetObjectReference objectReference, string argsJson) Unknown
Microsoft.JSInterop.dll!Microsoft.JSInterop.Infrastructure.DotNetDispatcher.BeginInvokeDotNet(Microsoft.JSInterop.JSRuntime jsRuntime, Microsoft.JSInterop.Infrastructure.DotNetInvocationInfo invocationInfo, string argsJson) Unknown
Microsoft.AspNetCore.Components.Server.dll!Microsoft.AspNetCore.Components.Server.Circuits.CircuitHost.BeginInvokeDotNetFromJS.AnonymousMethod__1() Unknown
Microsoft.AspNetCore.Components.dll!Microsoft.AspNetCore.Components.Rendering.RendererSynchronizationContext.InvokeAsync.__Execute|8_0((System.Runtime.CompilerServices.AsyncTaskMethodBuilder Completion, System.Action Action, Microsoft.AspNetCore.Components.Rendering.RendererSynchronizationContext Context) state) Unknown
Microsoft.AspNetCore.Components.dll!Microsoft.AspNetCore.Components.Rendering.RendererSynchronizationContext.InvokeAsync(System.Action action) Unknown
Microsoft.AspNetCore.Components.Server.dll!Microsoft.AspNetCore.Components.Server.Circuits.CircuitHost.BeginInvokeDotNetFromJS(string callId, string assemblyName, string methodIdentifier, long dotNetObjectId, string argsJson) Unknown
[Resuming Async Method]
System.Private.CoreLib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.Startd__45>(ref Microsoft.AspNetCore.Components.Server.Circuits.CircuitHost.d__45 stateMachine) Line 55 C#
Microsoft.AspNetCore.Components.Server.dll!Microsoft.AspNetCore.Components.Server.ComponentHub.BeginInvokeDotNetFromJS(string callId, string assemblyName, string methodIdentifier, long dotNetObjectId, string argsJson) Unknown
[Lightweight Function]
Microsoft.AspNetCore.SignalR.Core.dll!Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher.ExecuteMethod(Microsoft.Extensions.Internal.ObjectMethodExecutor methodExecutor, Microsoft.AspNetCore.SignalR.Hub hub, object[] arguments) Unknown
[Resuming Async Method]
System.Private.CoreLib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.Start.d__23>(ref Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher.d__23 stateMachine) Line 68 C#
Microsoft.AspNetCore.SignalR.Core.dll!Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher.ExecuteHubMethod(Microsoft.Extensions.Internal.ObjectMethodExecutor methodExecutor, Microsoft.AspNetCore.Components.Server.ComponentHub hub, object[] arguments, Microsoft.AspNetCore.SignalR.HubConnectionContext connection, System.IServiceProvider serviceProvider) Unknown
Microsoft.AspNetCore.SignalR.Core.dll!Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher.Invoke.__ExecuteInvocation|18_0(Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher dispatcher, Microsoft.Extensions.Internal.ObjectMethodExecutor methodExecutor, Microsoft.AspNetCore.Components.Server.ComponentHub hub, object[] arguments, Microsoft.Extensions.DependencyInjection.AsyncServiceScope scope, Microsoft.AspNetCore.SignalR.IHubActivator hubActivator, Microsoft.AspNetCore.SignalR.HubConnectionContext connection, Microsoft.AspNetCore.SignalR.Protocol.HubMethodInvocationMessage hubMethodInvocationMessage, bool isStreamCall) Unknown
Microsoft.AspNetCore.SignalR.Core.dll!Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher.Invoke(Microsoft.AspNetCore.SignalR.Internal.HubMethodDescriptor descriptor, Microsoft.AspNetCore.SignalR.HubConnectionContext connection, Microsoft.AspNetCore.SignalR.Protocol.HubMethodInvocationMessage hubMethodInvocationMessage, bool isStreamResponse, bool isStreamCall) Unknown
Microsoft.AspNetCore.SignalR.Core.dll!Microsoft.AspNetCore.SignalR.Internal.ChannelBasedSemaphore.RunTask<(Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher, Microsoft.AspNetCore.SignalR.Internal.HubMethodDescriptor, Microsoft.AspNetCore.SignalR.HubConnectionContext, Microsoft.AspNetCore.SignalR.Protocol.HubMethodInvocationMessage)>(System.Func<(Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher, Microsoft.AspNetCore.SignalR.Internal.HubMethodDescriptor, Microsoft.AspNetCore.SignalR.HubConnectionContext, Microsoft.AspNetCore.SignalR.Protocol.HubMethodInvocationMessage), System.Threading.Tasks.Task> callback, (Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher, Microsoft.AspNetCore.SignalR.Internal.HubMethodDescriptor, Microsoft.AspNetCore.SignalR.HubConnectionContext, Microsoft.AspNetCore.SignalR.Protocol.HubMethodInvocationMessage) state) Unknown
Microsoft.AspNetCore.SignalR.Core.dll!Microsoft.AspNetCore.SignalR.Internal.ChannelBasedSemaphore.RunAsync<(Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher, Microsoft.AspNetCore.SignalR.Internal.HubMethodDescriptor, Microsoft.AspNetCore.SignalR.HubConnectionContext, Microsoft.AspNetCore.SignalR.Protocol.HubMethodInvocationMessage)>(System.Func<(Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher, Microsoft.AspNetCore.SignalR.Internal.HubMethodDescriptor, Microsoft.AspNetCore.SignalR.HubConnectionContext, Microsoft.AspNetCore.SignalR.Protocol.HubMethodInvocationMessage), System.Threading.Tasks.Task> callback, (Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher, Microsoft.AspNetCore.SignalR.Internal.HubMethodDescriptor, Microsoft.AspNetCore.SignalR.HubConnectionContext, Microsoft.AspNetCore.SignalR.Protocol.HubMethodInvocationMessage) state) Unknown
Microsoft.AspNetCore.SignalR.Core.dll!Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher.ProcessInvocation(Microsoft.AspNetCore.SignalR.HubConnectionContext connection, Microsoft.AspNetCore.SignalR.Protocol.HubMethodInvocationMessage hubMethodInvocationMessage, bool isStreamResponse) Unknown
Microsoft.AspNetCore.SignalR.Core.dll!Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher.DispatchMessageAsync(Microsoft.AspNetCore.SignalR.HubConnectionContext connection, Microsoft.AspNetCore.SignalR.Protocol.HubMessage hubMessage) Unknown
Microsoft.AspNetCore.SignalR.Core.dll!Microsoft.AspNetCore.SignalR.HubConnectionHandler.DispatchMessagesAsync(Microsoft.AspNetCore.SignalR.HubConnectionContext connection) Unknown
[Resuming Async Method]
System.Private.CoreLib.dll!System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(System.Threading.Thread threadPoolThread, System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state) Line 192 C#
System.Private.CoreLib.dll!System.Runtime.CompilerServices.AsyncTaskMethodBuilder.AsyncStateMachineBox.d__21>.MoveNext(System.Threading.Thread threadPoolThread) Line 169 C#
System.Private.CoreLib.dll!System.Threading.ThreadPoolWorkQueue.Dispatch() Line 690 C#
System.Private.CoreLib.dll!System.Threading.PortableThreadPool.WorkerThread.WorkerThreadStart() Line 1328 C#
```

This happens when running in debug mode with Elsa 3.2.0-rc4