ERR_NGROK_390: You must use your own OAuth application, specifying its client ID and secret, in order to specify scopes - ngrok documentation

What does ERR_NGROK_390 mean?

ngrok returns ERR_NGROK_390 with this message:

You must use your own OAuth application, specifying its client ID and secret, in order to specify scopes.

Troubleshoot ERR_NGROK_390 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_390?

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