Let's Encrypt Failed Strange Error

When I request Let’s Encryt for a new domain on this freshly installed server, I get a strange error as in the attached image. Can anyone identify what could be going on here?

How I solved the same issue …

apt-get install socat certbot
certbot register / use a valid email

After that you can request a certificate through Virtualmin.

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Great. I assume this should work with CentOS 7 as well, right?
EDIT: It work perfectly. Thank you!