Common OpenVPN Connect Errors on Windows and How to Fix Them

- The client cannot complete the secure handshake with the server (certificate mismatch, encryption settings, or incorrect system clock).

- Check that both client and server certificates are valid and match.

- Ensure the server/client encryption settings are aligned.

- Verify your date/time settings.

- If you’re still stuck, contact ChitaVPN support.

- Username/password is incorrect or not matching the server credentials.

- Double-check your login credentials.

- Confirm the server is set to accept those credentials.

- If it persists, contact ChitaVPN support.

- The VPN connection was abruptly closed or took too long to establish.

- Check your internet and firewall rules.

- Ensure the server is reachable and stable.

- If needed, consult ChitaVPN support.

- The certificate is expired, untrusted, or incorrectly signed.

- Confirm certificate validity and expiration date.

- Use a trusted CA or re-import the correct certificate.

- If unresolved, contact ChitaVPN support.

- The .ovpn file is missing, misplaced, or unreadable.

- Verify the exact file path and name.

- Check folder permissions.

- If it’s still not found, contact ChitaVPN support.

- TAP driver not installed, corrupted, or blocked by another app.

- Reinstall or repair the TAP adapter (via the OpenVPN installer).

- Make sure no other software is monopolizing the adapter.

- If you still have trouble, contact ChitaVPN support.

- Communication with the server is interrupted or blocked.

- Check server logs for any clues.

- Ensure the server is online and not overloaded.

- If you’re stuck, ChitaVPN support can help.

- The client and server disagree on protocol, or the port is blocked.

- Match the protocol (UDP or TCP) between client and server.

- For TCP, confirm port-forwarding is correct.

- If unresolved, contact ChitaVPN support.

- The client received no response from the server in time.

- Verify the server’s IP/port is correct.

- Check firewalls and connectivity.

- If needed, reach out to ChitaVPN support.

- DNS cannot convert the server hostname to an IP.

- Check your DNS settings or try the server’s direct IP.

- If it continues, contact ChitaVPN support.

- Incorrect routing table entries or missing routes.

- Confirm that the server push-routes are correct.

- If you’re unsure, contact ChitaVPN support.

- The TAP-Windows adapter isn’t recognized or installed correctly.

- Reinstall or update the TAP-Windows driver.

- Double-check Windows Device Manager.

- If stuck, ChitaVPN support can help.

- The TAP adapter is installed but not active or visible in network settings.

- Reinstall the TAP adapter via Device Manager or the OpenVPN setup.

- Enable it in ncpa.cpl if it’s disabled.

- Run OpenVPN as Administrator.

- If you still have trouble, contact ChitaVPN support.