ERR_NGROK_1661: The endpoint configuration exceeds the maximum number of OAuth domains - ngrok documentation

What does ERR_NGROK_1661 mean?

ngrok returns ERR_NGROK_1661 with this message:

The endpoint configuration exceeds the maximum number of OAuth domains. You specified <COUNT>, the max is <MAX>.

Where can I get more help with ERR_NGROK_1661?

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