If Fix Please make sure /.well-known alias is setup in WWW server directadmin
Create a folder here "/var/www/html/.well-known/acme-challenge/", not in every domain user
create a file like this:
echo "test" >> /var/www/html/.well-known/acme-challenge/test.txt
and then test it via:
http://domain.com/.well-known/acme-challenge/test.txt
