ERR_NGROK_10102: Signup domains send new users to your SSO identity provider

What does ERR_NGROK_10102 mean?

ngrok returns ERR_NGROK_10102 with this message:

Signup domains send new users to your SSO identity provider. Set one up at https://dashboard.ngrok.com/settings/auth, then request your domain again.

Troubleshoot ERR_NGROK_10102 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.