[▲ Vercel Community](/) · [Categories](/categories) · [Latest](/latest) · [Top](/top) · [Live](/live) [Help](/c/help/9) # Vercel SSL certificate generation fails with http-01 challenge error 39 views · 0 likes · 2 posts Eswar Dudi (@eswar-7116) · 2026-03-10  ## Problem We could not generate a cert for `code-nyx.tech` because the required `http-01` challenge failed. ## Current Status * I have setup the `A` records correctly in the `DNS` records. * The website can be accessed via [http://code-nyx.tech](https://code-nyx.tech). * It cannot be accessed with `SSL` ([https://code-nyx.tech](https://code-nyx.tech)) and returns: **site can’t be reached. Let’s Debug Result:** !image|690x302 How do I fix this?? Please help me ASAP. Thank you. system (@system) · 2026-03-10 The domain troubleshooting guide can help with most custom domain configuration issues. You might be able to use that guide to solve it before a human is available to help you. Then you can come back here and share the answer for [bonus points](https://community.vercel.com/t/introducing-the-vercel-leaderboard/1358). [https://vercel.com/docs/projects/domains/troubleshooting](https://vercel.com/docs/projects/domains/troubleshooting) You can also use [v0](https://v0.dev/) to narrow down the possibilities.