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🐛 Troubleshooting

"Port already in use"

Change port in appsettings.json or use --port flag

"Certificate not found"

Run certificate generation (option 4 in startup scripts)

"Permission denied" when starting

Windows: Run as Administrator for ports < 1024
Linux: Use sudo or port > 1024

Client can't connect

Check firewall settings
Verify server is running: netstat -an | grep 2121
Try telnet test: telnet 0.0.0.0 2121