SSL certificate by Let's Encrypt

Netlify Site Name: poetic-chaja-83dd6f.netlify.app

My custom domain: haarstudio-kajin.de

I connected my domain through Netlify DNS, everything seems to be working, I also get the message " DNS verification was successful", however the certificate over Let’s encrypt is not created, even after 24 hours.

In my DNS provider I added the four Name Servers, and A record pointing to 75.2.60.5 and (www) CNAME record pointing to “poetic-chaja-83dd6f.netlify.app”. What am I doing wrong?

I see a valid SSL certificate @jamalxo