Base44 Custom Domain SSL Not Working? Fix DNS First

The browser warning feels like a security disaster

Seeing ERR_SSL_PROTOCOL_ERROR or a certificate warning on a domain you just launched is unsettling. It can make a healthy application look compromised or abandoned. The useful reframe is that your browser is reporting a failed trust path: the hostname, DNS answer, proxy, and certificate do not yet agree. That is serious for visitors, but it does not automatically mean the Base44 app code is broken.

Open the built-in app URL. If it loads, preserve that fact. Next test the root domain and www hostname separately and record what each returns. If the custom hostname loads a blank page instead of an SSL warning, compare with the blank Base44 preview guide; once TLS succeeds, rendering becomes a separate layer.

Cloudflare, extra A records, and invisible forwarding

A common source of confusion is editing records at the registrar while the authoritative nameservers point to Cloudflare or another DNS host. Change records where the nameservers say the zone is hosted. During setup, Base44 recommends DNS-only mode for its records so its own hosting and certificate path remain visible.

Public DNS may also show an A record you cannot find in the visible zone. Base44's troubleshooting guide says registrar parking, forwarding, or URL redirect features can create that record. Disable those features and check again after their TTL expires. Do not keep adding new Base44 records alongside the hidden one; multiple answers make verification and certificate issuance less predictable.

If repeated DNS experiments have become part of a larger unstable build, the vibe-coding recovery playbook helps you keep an evidence log and stop changing several layers at once. A domain problem by itself is normally a repair, not a reason to rebuild; the Base44 repair-or-rebuild guide explains the difference.

Read DNS results as a chain, not a screenshot

Begin with the authoritative nameservers. They tell you which provider actually answers for the domain. Query the root A or ALIAS result, the www CNAME, any AAAA record, and CAA. Compare public answers from more than one resolver with the zone you edited. If answers differ by region, propagation is still in progress; further edits reset the troubleshooting clock and can create a moving target.

Next inspect the certificate only after the hostname reaches Base44. Check the certificate names, issuer, validity dates, and whether the browser is receiving a certificate from an unexpected proxy or parking service. A certificate for the wrong hostname usually means the request is still reaching the wrong edge. A DNS lookup that returns the correct target from your laptop does not prove every resolver has updated.

Record TTLs and the time of the last change. Avoid promising a precise completion minute. Base44's 48-to-72-hour guidance is an upper troubleshooting window, not a claim that every change takes that long. If a domain was previously attached to another Base44 app, or an old app was deleted under conditions mentioned in current documentation, support may need to clear platform-side ownership.

What to send Base44 support after the DNS checks pass

Include the domain, Base44 app link, screenshot of the Domains status, authoritative nameservers, exact root and www records, public A, AAAA, CNAME, and CAA results, Cloudflare proxy state, registration status, the browser error, and timestamps with timezone. State when records last changed and whether the built-in URL works. Hide account identifiers that are not needed, but do not crop away record names or types.

This packet lets support distinguish propagation, certificate issuance, stale platform attachment, and rate limiting. It also protects you from repeating random unlink-and-relink cycles. If the status is pending or connecting, record how long it has remained unchanged before retrying.