What can be the reason for the certificate error "Certificate not issued for host 443"?

Question

Digital certificates

Certificate not issued for host ... :443.
did so https://habr.com/post/351252/
and
so https://itc-life.ru/poluchaem-letsencrypt-wildcard...
checked the certificate here
https://ssl4less.ru/ssl-tools/check -ssl-certificat...
i.e. I get a certificate, but when connected, it tells me that even something is wrong with him

#nginx

    listen [::]:443 ssl; # managed by Certbot
    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/....ru/certificate.crt; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/.....ru/ca_bundle.crt; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot