GSC Change of Address Failing: "Couldn't fetch the page"

I am trying to use Google Search Console’s ‘Change of Address’ tool to migrate from my oliverrevelo.vercel.app domain to my new custom domain. The tool is failing because Googlebot ‘Couldn’t fetch the page.’ It seems my .vercel.app domain is blocking crawlers, but the setting to disable this is no longer visible in my Project Settings. Can you please assist me in allowing Googlebot to crawl my vercel.app domain so it can verify my 301 redirect?

A 301 status code means a permanent redirect. That “validation failed” message is telling you that you need to add a permanent redirect from the old domain to the new one. You can set a redirect in the project’s domain settings.

Yes. But I already did those redirects. So I’m not sure what’s still causing the errors.

Is the project’s deployment protection setting restricting access? You may need to change it temporarily