Same here on Windows 11, Build 22000 (same software version of NAPS2). The error page shows a lot of repeated messages like these: 2021-12-01 10:57:56.3553 Error preparing downloaded file System.ArgumentException: 1 is not a supported code page. Parameter name: codepage at System.Text.Encoding.GetEncoding(Int32 codepage) at ICSharpCode.SharpZipLib.Zip.ZipFile.ReadEntries() at ICSharpCode.SharpZipLib.Zip.ZipFile..ctor(String name) at NAPS2.Dependencies.DownloadFormat.ZipDownloadFormat.Extract(String...