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The word document in attachment is a minimal example of a file that cannot be exported to html by Syncfusion.DocIO.DLS.HTMLExport.

It throws an error about an invalid character, but that character is not part of the Word text. I tried
but to no avail. When doing doc.GetText(), it does show up.

I'm using the latest version via NuGet

System.ArgumentException: ' ', hexadecimal value 0x01, is an invalid character.
   at System.Xml.XmlUtf8RawTextWriter.InvalidXmlChar(Int32 ch, Byte* pDst, Boolean entitize)
   at System.Xml.XmlUtf8RawTextWriter.WriteRawWithCharChecking(Char* pSrcBegin, Char* pSrcEnd)
   at System.Xml.XmlUtf8RawTextWriter.WriteRaw(String data)
   at System.Xml.XmlWellFormedWriter.WriteRaw(String data)
   at Syncfusion.DocIO.DLS.HTMLExport.WriteParagraphOrList(WParagraph para)
   at Syncfusion.DocIO.DLS.HTMLExport.WriteParagraph(WParagraph para)
   at Syncfusion.DocIO.DLS.HTMLExport.WriteTextBody(WTextBody body)
   at Syncfusion.DocIO.DLS.HTMLExport.WriteSection(WSection sec)
   at Syncfusion.DocIO.DLS.HTMLExport.WriteBody(WordDocument doc)
   at Syncfusion.DocIO.DLS.HTMLExport.WriteXhtml(WordDocument doc, String cssFileName)
   at Syncfusion.DocIO.DLS.HTMLExport.SaveAsXhtml(WordDocument doc, Stream stream, Encoding encoding)