[Observium] wget - Read Error in Headers (Connection Reset by Peer)

I want to install Observium (observium.org) on my virtual Ubuntu Server but when I try to download files, I get a read error.

wget http://www.observium.org/observium-community-latest.tar.gz

--2017-06-28 10:53:16-- http://www.observium.org/observium-community-latest.tar.gz

Resolving www.observium.org (www.observium.org)... 37.187.79.83

Connecting to www.observium.org (www.observium.org)|37.187.79.83|:80... connected.

HTTP request sent, awaiting response... Read error (Connection reset by peer) in headers.

Retrying.

I couldn't find any solution.

I use static IPv4 address and DNS servers.

Ubuntu 16.04 LTS works on VCENTER Virtual Machine Version: 11 and Network Adapter is VM Network.

Any solutions?

Thanks.