ERR_NGROK_SHIP_POOL_INTEGRATION_ID_REQUIRED: The 'integration_id' field must not be empty - ngrok documentation

What does ERR_NGROK_SHIP_POOL_INTEGRATION_ID_REQUIRED mean?

ngrok returns ERR_NGROK_SHIP_POOL_INTEGRATION_ID_REQUIRED with this message:

The 'integration_id' field must not be empty. A <KIND> pool is provisioned through an integration.

Where can I get more help with ERR_NGROK_SHIP_POOL_INTEGRATION_ID_REQUIRED?

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