What is the problem with the site dns or ssl or whatever?

Question

Domain Name System

Patient https://www.mamba-rambler.ru/
In the yandex panel, the https:// and http:// domains are pasted up + writes that the site is closed for indexing . I
started digging, outwardly everything is in order.
1. I checked robots.txt, .htaccess in the root of the site
2. I thought it was a virus, I didn't find anything.
3. I tried to update SSL (Lets Encript), I thought some glitches did not work (the deadline was right). For some reason, another IP appears. I checked the DNS records: my IP is 151.248.120.141

4. Services for checking the server response give errors. But the browser opens the site.
5. In httpd.conf (Centos 6) everything is the same as on my other two dozen sites.

Answer 1

MAMBA-RAMBLER.RU domain registration has expired.
And you have a cache DNS;)

Answer 2

Indeed, some issues with the renewal, although I paid and the domain is active in my account.
Thank you for your help!!!