[webmin-l] Let's Encrypt Missing slash / before .well-known

[Kimberly <kim...@gm...>]

On the Apache based Virtualmin Server I am seeing when I try to request 
the certificate/renewal the following:

Domain: domain.tld

Type: connection

Detail: Could not connect to domain.tld.well-known

And the same for the www.domain.tld.

Shouldn't there be a slash (/) before the .well-known and if yes, how do 
I fix this?