Symptoms

  • “Update subscription failed” error
  • “404” or “Network error” when importing
  • Server list is empty after importing
  • Old servers disappear after updating

Common causes and fixes

Your subscription link may have been regenerated or your account may have expired.

Fix:

  1. Log in to your dashboard
  2. Go to the subscription section
  3. Click Copy subscription link
  4. Replace the old link in your app with the fresh one
  5. Try updating again

2. Network blocks the API endpoint

Some networks block the domain where our subscription API is hosted.

Fix:

  • Try updating the subscription while connected to a different network (e.g., mobile hotspot)
  • Use a friend’s VPN temporarily to download the subscription, then switch back to SericaVPN
  • Contact us for an alternative subscription delivery method

3. App cache is stale

The app may be caching an old or corrupted subscription response.

Fix by app:

  • Hiddify: Settings → Subscription → Delete the old subscription → Re-add with the new link
  • V2RayNG: Subscription settings → Delete → Re-add
  • Streisand: Remove the old config → Re-import from URL

4. Time and date mismatch

If your device’s clock is significantly off, TLS handshakes to our API will fail.

Fix:

  • Make sure your device time is set to automatic
  • On Windows: Settings → Time & language → Set time automatically
  • On mobile: Settings → Date & time → Use network-provided time

5. DNS blocking the API domain

Your ISP or network may be returning fake DNS results for our API domain.

Fix:

  • Change your device’s DNS to 1.1.1.1 (Cloudflare) or 8.8.8.8 (Google) before updating the subscription
  • Some apps allow setting a custom DNS just for subscription updates

Paste your subscription link into a web browser. You should see a plain text or JSON response with server configurations. If you see an error page, the link is invalid or blocked.

If nothing works

Contact support@sericavpn.com with:

  • Your account email
  • The exact error message you’re seeing
  • The VPN app and version you’re using
  • Whether you can open the subscription link in a browser

We can generate a manual configuration file or provide an alternative import method.