When a document file gets Approved or Archived, the signature page is not attached to the viewable rendition page.
The Source PDF file is password protected. By design, if using password protection for a PDF file to control view access, Vault cannot create a viewable rendition with signature pages.
- Check the Document Properties --> Security --> Security Method.
- Use No Security for PDF source document file. Upload to Vault to generate a viewable rendition with a Signature page.
- Vault Help Documentation: Vault Help