Using ITEXT7 with HTML TO PDF ADDON, I have the following error
The following error doesn’t appear in local env

System.NullReferenceException: Object reference not set to an instance of an object.
   at iText.Html2pdf.Attach.Impl.Tags.BrTagWorker..ctor(IElementNode element, ProcessorContext context)
   at iText.Html2pdf.Attach.Impl.DefaultTagWorkerMapping.<>c.<.cctor>b__1_10(IElementNode lhs, ProcessorContext rhs)
   at iText.Html2pdf.Attach.Impl.DefaultTagWorkerFactory.GetTagWorker(IElementNode tag, ProcessorContext context)
   at iText.Html2pdf.Attach.Impl.DefaultHtmlProcessor.Visit(INode node)
   at iText.Html2pdf.Attach.Impl.DefaultHtmlProcessor.Visit(INode node)
   at iText.Html2pdf.Attach.Impl.DefaultHtmlProcessor.Visit(INode node)
   at iText.Html2pdf.Attach.Impl.DefaultHtmlProcessor.Visit(INode node)
   at iText.Html2pdf.Attach.Impl.DefaultHtmlProcessor.Visit(INode node)
   at iText.Html2pdf.Attach.Impl.DefaultHtmlProcessor.Visit(INode node)
   at iText.Html2pdf.Attach.Impl.DefaultHtmlProcessor.Visit(INode node)
   at iText.Html2pdf.Attach.Impl.DefaultHtmlProcessor.Visit(INode node)
   at iText.Html2pdf.Attach.Impl.DefaultHtmlProcessor.ProcessDocument(INode root, PdfDocument pdfDocument)
   at iText.Html2pdf.Attach.Attacher.Attach(IDocumentNode documentNode, PdfDocument pdfDocument, ConverterProperties converterProperties)
   at iText.Html2pdf.HtmlConverter.ConvertToDocument(String html, PdfDocument pdfDocument, ConverterProperties converterProperties)
   at iText.Html2pdf.HtmlConverter.ConvertToPdf(String html, PdfDocument pdfDocument, ConverterProperties converterProperties)
   at iText.Html2pdf.HtmlConverter.ConvertToPdf(String html, PdfWriter pdfWriter, ConverterProperties converterProperties)

this error appear only in windows server environement while using remote debug it turn out to be an internal error to the library I couldn’t know more about it

this error got triggerd every time I have a <br> in my HTML remove it fixe but I don’t like the fact that I have to remove a tag so It ‘works’

PS : I already checked this.
iText 7 HTML to PDF error when deployed in IIS