ERR_NGROK_SHIP_POOL_DETAILS_LIST_REQUIRED: The FIELD list must have at least one entry - ngrok documentation

What does ERR_NGROK_SHIP_POOL_DETAILS_LIST_REQUIRED mean?

ngrok returns ERR_NGROK_SHIP_POOL_DETAILS_LIST_REQUIRED with this message:

The <FIELD> list must have at least one entry.

Where can I get more help with ERR_NGROK_SHIP_POOL_DETAILS_LIST_REQUIRED?

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