ERR_NGROK_SHIP_ENVIRONMENT_POOL_ID_NOT_FOUND: No pool with the ID ID exists on this account - ngrok documentation

What does ERR_NGROK_SHIP_ENVIRONMENT_POOL_ID_NOT_FOUND mean?

ngrok returns ERR_NGROK_SHIP_ENVIRONMENT_POOL_ID_NOT_FOUND with this message:

No pool with the ID <ID> exists on this account.

Where can I get more help with ERR_NGROK_SHIP_ENVIRONMENT_POOL_ID_NOT_FOUND?

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