If your custom domain verifies in Netlify but the live site still serves *.netlify.app, and Let's Encrypt never issues (or renew fails with "certificate parameter is required" / NXDOMAIN on _acme-challenge), you are in the last-mile SSL trap.
Common shapes this week:
- DNS looks fine; browser still shows hostname mismatch on the default Netlify cert
- Wildcard / CertOrder path stuck while
wwwnever joins the cert - LE renew dying on DNS-01 before expiry
I put the operator packet on a one-pager: what to check, what to fix, when to stop guessing.
Landing: https://dual-gate-packet-saas-builders1.vercel.app/ssl/
Pay $99: https://buy.stripe.com/7sY28s5BNg3G7lM4GlbEA01
Not a course. The packet.
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