Hey!
I’ve created a new branch subdomain with Cloudflare dns.
I’ve tried to use cloudflare certificate but it doesn’t work, so I fallback to build-in Let’s Encrypt certificate, but it works only for my primary domain allstack.ru (https://all-stack.netlify.app/)
Could you create another one for staging.allstack.ru (staging–all-stack.netlify.app) as mentioned into [Support Guide] How to use Netlify’s branch deploy feature without Netlify DNS