FedEx ‑ Create shipping labels

I'm extremely grateful that this has been built, but it doesn't work well. It took me ten minutes to finish a single shipment because it claimed an address was not filled out, but it was! Eventually entering an insurance value is what enabled the shipment to properly validate. I suspect this problem is because the FedEx Ship Manager is super slow and does not work well, but I can't rule out that it's something with this Shopify extension.