Custom domain down: SSL received a record that exceeded the maximum permissible length

I have a next.js site with a custom domain registered at vercel and it throws intermittent ssl errors. It worked fine for months and now regularly throws “SSL received a record that exceeded the maximum permissible length.” errors even though I’ve made no changes.

Domain: jaredneedsfood.xyz

Error occurs on load. Vercel dashboard shows no indication of domain, DNS, or SSL misconfiguration.

SSL Checker finds no problems with the ssl on this domain.

I have removed the custom domain, waited an hour, updated by source repo and redeployed to no avail. Can a Vercel team member manually purge the Edge Cache and re-check the routing configuration for jaredneedsfood.xyz? The app runs fine at https://grocery-list-psi-henna.vercel.app/

This error is usually caused by your network sending HTTP traffic to an HTTPS site

  • do you get the error on your other devices? other wifi/mobile data?
  • do you use any corporate proxy or VPN?
  • do you have any antivirus enabled?

The certificates all appear to be in order and fully propagated

It appears to happen on 2 different wifi networks on multiple devices. If I use mobile data or a vpn it works.