During secondary validation: 52.144.33.177: Fetching http://webfiles.artiflexmfg.com/.well-known/acme-challenge/6QePDg9XYYpFmIX8t4E43WbXUiF_AoBwKMyu-P0Y7Oo: Timeout during connect (likely firewall problem)
Your webfiles.artiflexmfg.com site is only accessible from a few places in the world, so Let's Encrypt can't validate that you actually control that name.