Unfortunately, you didn't actually install the certificate. The certificate you see with ssl-checker is a self-signed cert, not one from Let's Encrypt.
Your other sites do present valid Let’s Encrypt certificates, but the elsazonvenezolano.com one presents a very different certificate.
Certificate:
Data:
Version: 3 (0x2)
Serial Number: 15706018259109459200 (0xd9f6fc648204b500)
Signature Algorithm: sha1WithRSAEncryption
Issuer: CN=fake, O=My Company Name LTD., C=US
Validity
Not Before: Sep 29 01:34:41 2016 GMT
Not After : Feb 15 01:34:41 2044 GMT
Subject: CN=fake, O=My Company Name LTD., C=US```
(Skipping some additional data.)
*Something* must be different about your configuration, even if it's only a typographical error in the name of the virtual host or something. You do have valid certificates
https://crt.sh/?q=elsazonvenezolano.com
but they're simply not being *presented* by your server to visitors, which has to be a site configuration problem somehow.