PdfFormatProvider pdfFormatProvider = new();

            RadFixedDocument document = pdfFormatProvider.Import(bytes);

   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Converters.AppearanceConverter.ConvertFromDictionary(PostScriptReader reader, IPdfImportContext context, PdfDictionary dictionary)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Converters.AppearanceConverter.Convert(Type type, PostScriptReader reader, IPdfImportContext context, IPdfPrimitive value)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Converters.AppearanceConverter.ConvertFromIndirectReference(Type type, PostScriptReader reader, IPdfImportContext context, IndirectReference indirectReference)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Converters.AppearanceConverter.Convert(Type type, PostScriptReader reader, IPdfImportContext context, IPdfPrimitive value)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Converters.AppearancesConverter.TryImportAppearance(String key, PostScriptReader reader, IPdfImportContext context, PdfDictionary appearancesDictionary, Appearance& appearance)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Converters.AppearancesConverter.ConvertFromDictionary(Type type, PostScriptReader reader, IPdfImportContext context, PdfDictionary dictionary)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Converters.Converter.Convert(Type type, PostScriptReader reader, IPdfImportContext context, IPdfPrimitive value)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Data.PdfPropertyBase`1.PrepareValue(PostScriptReader reader, IPdfImportContext context, IPdfPrimitive value)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Data.LoadOnDemandPropertyBase`1.GetValueFromSource(Boolean shouldDecrypt)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Data.LoadOnDemandPropertyBase`1.GetValue(Boolean shouldDecrypt)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.Annotations.AnnotationObject.get_Appearances()
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.Annotations.AnnotationObject.ToAnnotation(PostScriptReader reader, IRadFixedDocumentImportContext context, Double pageHeightInDip)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.DocumentStructure.Page.<>c__DisplayClass21_0.<CopyPageAnnotationsTo>b__0()
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.ExceptionHandling.ExecutionHandler.TryHandleExecution[E](Action operation)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.DocumentStructure.Page.CopyPageAnnotationsTo(IRadFixedDocumentImportContext context, RadFixedPage fixedPage)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.DocumentStructure.DocumentCatalog.<>c__DisplayClass59_2.<CopyAllPageProperties>b__2()
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.ExceptionHandling.ExecutionHandler.TryHandleExecution[E](Action operation)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.DocumentStructure.DocumentCatalog.CopyAllPageProperties(PostScriptReader reader, IRadFixedDocumentImportContext context, List`1 contextPages, IList`1 pages)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.DocumentStructure.DocumentCatalog.CopyPagePropertiesTo(PostScriptReader reader, IRadFixedDocumentImportContext context)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.DocumentStructure.DocumentCatalog.CopyPropertiesTo(PostScriptReader reader, IRadFixedDocumentImportContext context)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Import.RadFixedDocumentImportContext.BeginImportOverride()
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Import.BaseImportContext.BeginImport(Stream pdfFileStream)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Import.PdfImporter.Import(Stream input, IPdfImportContext context)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.PdfFormatProvider.<>c__DisplayClass18_0.<ImportOverride>b__0()
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.ExceptionHandling.ExecutionHandler.TryHandleExecution[E](Action operation)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.PdfFormatProvider.ImportOverride(Stream input)
   at Telerik.Windows.Documents.Common.FormatProviders.FormatProviderBase`1.Import(Stream input)
   at Telerik.Windows.Documents.Common.FormatProviders.BinaryFormatProviderBase`1.Import(Byte[] input)
   at Client.Wpf.Common.UserControls.PdfViewer.LoadBytesToPdfViewer(Byte[] bytes) in C:\Users\tomas.filip\source\repos\FiFi\Client.Wpf\Common\UserControls\PdfViewer.xaml.cs:line 65
   at System.Reactive.AnonymousSafeObserver`1.OnNext(T value)
   at System.Reactive.ObserveOnObserverNew`1.DrainStep(ConcurrentQueue`1 q)
   at System.Reactive.ObserveOnObserverNew`1.DrainShortRunning(IScheduler recursiveScheduler)
   at System.Reactive.Concurrency.DispatcherScheduler.<>c__DisplayClass12_0`1.<Schedule>b__0()
   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)
   at System.Windows.Threading.DispatcherOperation.InvokeImpl()
   at MS.Internal.CulturePreservingExecutionContext.CallbackWrapper(Object obj)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)