ERR_NGROK_1639: Invalid endpoint configuration, OAuth provider PROVIDER contains an invalid email domain: NAME - ngrok documentation

What does ERR_NGROK_1639 mean?

ngrok returns ERR_NGROK_1639 with this message:

Invalid endpoint configuration, OAuth provider <PROVIDER> contains an invalid email domain: <NAME>.

Troubleshoot ERR_NGROK_1639 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_1639?

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