I have purchased my domain from namesilo.com. Originally I used nameserver from Cloudflare and everything worked fine. Then I saw Vercel notification that I should not use Cloudflare before Vercel. Then I changed nameserver address in namesilo.com from Cloudflare to Vercel. Below error occurred.

Originally when using Cloudflare, the DNS values were set there. But after I changed nameserver to Vercel, I cannot find the place to configure DNS.
After reading Vercel documentation, I deleted the domain in the project and add it from domain tab of my projects' page. The error changed to below.

Please advise. Thank you very much.

