Try Different Server:

Current server may be overloaded or blocked. Select a server in different country. Most VPNs offer many options.

Change VPN Protocol:

OpenVPN may be blocked on some networks. Try IKEv2 or WireGuard instead. Check VPN app settings for protocol options.

Temporarily Disable Firewall:

Firewall may block VPN connections. Disable briefly to test. If VPN works, add exception for VPN application.

Flush DNS Cache:

Open Command Prompt. Run "ipconfig /flushdns". DNS issues can prevent VPN connections.

Update VPN App:

Outdated VPN software causes problems. Check for updates in the app. Download latest version from official website.

Reinstall TAP Adapter:

Device Manager > Network adapters. Uninstall TAP adapters. Reinstall VPN software to restore them.

Conclusion:

Server and protocol changes resolve most issues. If still failing, try different VPN service or contact support.