I am trying to migrate a function intensive site to Vercel. I have removed the domains from Netlify, I have transferred the domains across to Vercel. Vercel shows valid configuration for both the .com and the www. redirect.
However, when I try to visit the site, I am seeing a Netlify 404 page, see below. This page should not exist anymore at all, as I am not building my site on Netlify nor hosting it on Netlify.
This is causing a severe problem. After 20 minutes, the site was briefly up and functioning correctly on my device and others. Then, after 1 hour, it reverted to the Netlify Site Not Found view. Please help me resolve this issue. Thank you.