ERR_NGROK_SHIP_EARLY_ACCESS_NOT_ALLOWED: Ship is in early access - ngrok documentation

What does ERR_NGROK_SHIP_EARLY_ACCESS_NOT_ALLOWED mean?

ngrok returns ERR_NGROK_SHIP_EARLY_ACCESS_NOT_ALLOWED with this message:

Ship is in early access.

Where can I get more help with ERR_NGROK_SHIP_EARLY_ACCESS_NOT_ALLOWED?

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