How to migrate the SSL for on domain?

I found this information and use to copy the etc/letsencrypt - Best Way to Backup letsencrypt folder

Now when I try to open my wordpress site I receive this message.

Safari can’t open the page “https://www.lojadasroupinhas.com.br” because Safari can’t establish a secure connection to the server “www.lojadasroupinhas.com.br”.

Regards