ERR_NGROK_4502: The TCP port PORT for HOST is not within the range of possible ngrok ports - ngrok documentation

What does ERR_NGROK_4502 mean?

ngrok returns ERR_NGROK_4502 with this message:

The TCP port <PORT> for <HOST> is not within the range of possible ngrok ports.

Troubleshoot ERR_NGROK_4502 with your AI agent. Connect it to the ngrok MCP server, then ask what caused the error and how to fix it.

Where can I get more help with ERR_NGROK_4502?

Email support@ngrok.com and include the error code.