ERR_NGROK_SHIP_REPLICA_ID_REQUIRED: The 'replica_id' field is required - ngrok documentation

What does ERR_NGROK_SHIP_REPLICA_ID_REQUIRED mean?

ngrok returns ERR_NGROK_SHIP_REPLICA_ID_REQUIRED with this message:

The 'replica_id' field is required.

Where can I get more help with ERR_NGROK_SHIP_REPLICA_ID_REQUIRED?

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