ERR_NGROK_122: Your account is not permitted to use the agent ingress "DOMAIN"

What does ERR_NGROK_122 mean?

ngrok returns ERR_NGROK_122 with this message:

Your account is not permitted to use the agent ingress "<DOMAIN>".

Troubleshoot ERR_NGROK_122 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.