Your request can fail in two ways. Either the hostname could not resolve into an IP or the address simply does not exist.
I just try to access to http://www.aloharooms.com.ar/ without luck but using
ping -c 5 aloharooms.com.ar [ruby-head]
PING aloharooms.com.ar (188.8.131.52): 56 data bytes
64 bytes from 184.108.40.206: icmp_seq=0 ttl=57 time=246.424 ms
64 bytes from 220.127.116.11: icmp_seq=1 ttl=57 time=245.720 ms
64 bytes from 18.104.22.168: icmp_seq=2 ttl=57 time=348.878 ms
64 bytes from 22.214.171.124: icmp_seq=3 ttl=57 time=267.025 ms
64 bytes from 126.96.36.199: icmp_seq=4 ttl=57 time=283.930 ms
--- aloharooms.com.ar ping statistics ---
5 packets transmitted, 5 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 245.720/278.395/348.878/37.994 ms
If I access to http://188.8.131.52/, I can see a WordPress blog:
Can you take a look to this docs?
Please let us know if this solves the issue.
Carlos R. Hernández