ILSpy crash

[greenozon]

Steps to reproduce

1. browse assemblies
2. goto - Derived Types

Error message shown

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Sorry, we crashed
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System.AggregateException: One or more errors occurred. (ValueFactory returned null.)

 ---> System.InvalidOperationException: ValueFactory returned null.

   at System.Threading.LazyInitializer.EnsureInitializedCore[T](T& target, Func`1 valueFactory)

   at ICSharpCode.ILSpyX.LoadedAssembly.GetTypeSystemOrNull() in /_/ICSharpCode.ILSpyX/LoadedAssembly.cs:line 212

   at ICSharpCode.ILSpyX.LoadedAssemblyExtensions.GetTypeSystemOrNull(MetadataFile file) in /_/ICSharpCode.ILSpyX/LoadedAssemblyExtensions.cs:line 47

   at ICSharpCode.ILSpy.TreeNodes.DerivedTypesTreeNode.FindDerivedTypes(AssemblyList list, ITypeDefinition type, CancellationToken cancellationToken)+MoveNext()

   at ICSharpCode.ILSpy.TreeNodes.ThreadingSupport.<>c__DisplayClass8_0.<LoadChildren>b__0()

   at System.Threading.Tasks.Task`1.InnerInvoke()

   at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state)

--- End of stack trace from previous location ---

   at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state)

   at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread)

   --- End of inner exception stack trace ---

   at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)

   at System.Threading.Tasks.Task.Wait(Int32 millisecondsTimeout, CancellationToken cancellationToken)

   at System.Threading.Tasks.Task.Wait(TimeSpan timeout, CancellationToken cancellationToken)

   at System.Threading.Tasks.Task.Wait(TimeSpan timeout)

   at ICSharpCode.ILSpy.TreeNodes.ThreadingSupport.LoadChildren(SharpTreeNode node, Func`2 fetchChildren)

   at ICSharpCode.ILSpy.TreeNodes.DerivedTypesTreeNode.LoadChildren()

   at ICSharpCode.ILSpyX.TreeView.SharpTreeNode.EnsureLazyChildren() in /_/ICSharpCode.ILSpyX/TreeView/SharpTreeNode.cs:line 339

   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)
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OK   
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Details

• ILSpy version 9.0.0.7722-preview2
  .NET version 8.0.8+08338fcaa5c9b9a8190abb99222fed12aaba956c