ERR_NGROK_4019: This account cannot be deleted because it has an active billing subscription

What does ERR_NGROK_4019 mean?

ngrok returns ERR_NGROK_4019 with this message:

This account cannot be deleted because it has an active billing subscription. Contact support@ngrok.com for help deleting this account.

Troubleshoot ERR_NGROK_4019 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.