ERR_NGROK_389: You must specify an OAuth client ID and secret for a custom application or neither client ID nor a secret for the ngrok-managed OAuth application - ngrok documentation

What does ERR_NGROK_389 mean?

ngrok returns ERR_NGROK_389 with this message:

You must specify an OAuth client ID and secret for a custom application or neither client ID nor a secret for the ngrok-managed OAuth application.

Troubleshoot ERR_NGROK_389 with your AI agent. Connect it to the ngrok MCP server, then ask what caused the error and how to fix it.

Where can I get more help with ERR_NGROK_389?

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