How to set valid uri for writing a pdf file in Xamarin Android app?

Question

The line in the code below HtmlConverter.ConvertToPdf() is throwing an error stating "Invalid URI: The format of the URI could not be determined." and I can't figure it out.

Do I need a protocol prefix like file:// or is it something else?

The variable path resolves to '/data/user/0/com.companyname.worksmanager/files'

            try
            {

                string strCPP;
                using (StreamReader reader = new StreamReader(Application.Context.Assets.Open("CPP.html"), true))
                {
                    strCPP = reader.ReadToEnd();
                }

                PdfWriter pdfWriter = new PdfWriter(new FileInfo(Path.Combine(path, "CPP.pdf")));
                HtmlConverter.ConvertToPdf("<h1>test</h1>", pdfWriter);

            }
            catch(Exception ex)
            { }

Changing the way I create the file and changing the save directory still produces the same error message.

                string pathPDF = Path.Combine(Android.App.Application.Context.GetExternalFilesDir(null).ToString(), "CPP.pdf");
                HtmlConverter.ConvertToPdf(strCPP, new FileStream(pathPDF, FileMode.Create));