A customer purchases a digital product from your store, receives their email confirmation receipt, and clicks the secure download link. But instead of downloading their file, they are taken to a broken page that displays an error message: "Invalid or expired download link." This happens even though the store manager has explicitly configured the link to never expire.

This issue is caused by a conflict between secure path token generation rules and server-level redirection structures. To protect files from being shared publicly, WooCommerce hides your true server file paths behind secure dynamic links. If you host digital assets on external cloud storage (like Amazon S3 or Google Cloud Storage) and your integration plugin has mismatched server time synchronization settings, the security token will expire prematurely, locking customers out of their purchases.

The Solution

Fixing digital download link drops requires adjusting file delivery configurations and verifying server clock accuracy.

  1. Adjust File Download Method: Navigate to WooCommerce > Settings > Products > Downloadable Products. Locate the File download method dropdown menu. Change the setting from "Force Downloads" to X-Accel-Redirect/X-Sendfile.

    Note: This passes file streaming operations straight to Apache or Nginx, preventing PHP timeout errors on large file transfers.

  2. Synchronize Server Time Clocks: Ensure your web host server is actively synchronized with an NTP (Network Time Protocol) server pool, keeping your database clock accurate.

  3. Use Absolute URL Mapping Path Codes: If you host download files on your local server, avoid using complex relative paths. Always use clean, absolute URL paths starting with https:// inside the product specifications panel.