having to renew the certificate now expired, I found myself with this error:
Attempting to renew cert from /etc/letsencrypt/renewal/www.mysite.com.conf produced an unexpected error: urn: acme: error: rateLimited :: too many failed authorizations recently: see https://letsencrypt.org/docs/rate-limits/. Skipping.
Client with the currently selected authenticator does not support any combination of challenges that will satisfy the CA.
To perform the renewal, first in: cd / etc / letsencrypt,
and by root launch the command: certbot -q renew --apache.
I already thank those who will help me.