If used wordpress multisite with webinoly There is a chance that SSL does not renew automatically. You must then manually renew.
Renew all certificates that have expired within 30 days
sudo site -ssl=renew
Force certificate renewal for a specific website
sudo site datvnn.com -ssl=force-renewal
For this case, the renewal notice can be successful. But in fact it creates a different certificate
datvnn.com-0001 and your web site is still inaccessible.
To resolve this problem, go to
/etc/letsencrypt/archive/ and rename datvnn.com-0001 to datvnn.com and vice versa (change datvnn.com to your domain name)