Getting Error While adding Encrypt to PDF

Aspose.PDF Plugin Family
1

I have a method that combines multiple PDF files and applies security settings. However, when I try to add encryption, I receive the error BC30454: “Expression is not a method.”

This is a .NET Framework 4.8 Web application using Aspose.PDF version 25.12.0.

Dim merged As New Aspose.Pdf.Document()
If Not String.IsNullOrWhiteSpace(passcode) Then

       ' userPassword: required to open the PDF
       ' ownerPassword: controls permissions (use different one if you want stronger control)
       merged.Encrypt(
       passcode,                          ' userPassword
       passcode,                          ' ownerPassword
       Permissions.PrintDocument,         ' allow printing only
       Aspose.Pdf.CryptoAlgorithm.AESx128            ' AES-128 encryption
   )
   End If
2

@camincargo

If possible, could you please provide some sample PDFs for our reference along with complete sample code snippet that you have been using? We will test the scenario in our environment and address it accordingly.