README here says go to https://goshippo.com/docs, which leads to https://goshippo.com/docs/client-libraries/, which says go to https://github.com/goshippo/shippo-php-client.
I'm using shippo with foxycart.io. Some requests are failing and only the end user is seeing an error message. Where are shippo errors ending up? I don't see them in the goshippo website or in my wordpress/foxycart back end.
Thank you!