ERR_NGROK_6001: This tunnel is no longer available as its account was not found

What does ERR_NGROK_6001 mean?

ngrok returns ERR_NGROK_6001 with this message:

This tunnel is no longer available as its account was not found.

Troubleshoot ERR_NGROK_6001 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.