Importing a PDF document (attached) fails, I have imported documents from this site before but maybe this is a newer one and this is a legit error message, just wondering if there is anything that can be done:
2021-11-12 15:44:08.2670 Error importing PDF file. PdfSharp.Pdf.IO.PdfReaderException: The PDF document is protected with an encryption not supported by PDFsharp.
at PdfSharp.Pdf.Security.PdfStandardSecurityHandler.ValidatePassword(String inputPassword)
at PdfSharp.Pdf.IO.PdfReader.Open(Stream stream, String password, PdfDocumentOpenMode openmode, PdfPasswordProvider passwordProvider)
at PdfSharp.Pdf.IO.PdfReader.Open(String path, String password, PdfDocumentOpenMode openmode, PdfPasswordProvider provider)
at NAPS2.ImportExport.Pdf.PdfSharpImporter.<>c__DisplayClass6_0.<<import>b__0>d.MoveNext()</import>