ERR_NGROK_2243: Invalid configuration for ACTION: CONFIG DOMAIN is not a valid domain

What does ERR_NGROK_2243 mean?

ngrok returns ERR_NGROK_2243 with this message:

Invalid configuration for <ACTION>: <CONFIG> <DOMAIN> is not a valid domain.

Troubleshoot ERR_NGROK_2243 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.