We recently updated from Aspose.Pdf 21.9.0 to Aspose.Pdf.Drawing 26.3.0. We have found that PDFAnnotationEditor.RedactArea throws IndexOutOfRangeException on certain documents. The older version of Aspose.PDF can redact …...= new Document(stream); var editor = new PdfAnnotationEditor(document);...Rectangle(70, 480, 190, 705); editor.RedactArea(1, rectangle, System...