ERR_NGROK_27708: The API surface "SURFACE" is not a supported ngrok surface

What does ERR_NGROK_27708 mean?

ngrok returns ERR_NGROK_27708 with this message:

The API surface "<SURFACE>" is not a supported ngrok surface.

Troubleshoot ERR_NGROK_27708 with your AI agent. Connect it to the ngrok MCP server, then ask what caused the error and how to fix it.

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