Symfony新项目问题

I'm trying to install Symfony for the first time and when I try to create a new project, the system gives me an error. When i use:

symfony new test

It leads to:

[GuzzleHttp\Exception\ClientException]                                                                      
Client error response [url] http://symfony.com/versions.json [status code] 400 [reason phrase] Bad Request 

I'm using Ubuntu 16.04 and followed symfony setup tutorial by the book, the installation worked fine, the only thing I had to do differently is to set the proxy configuration.

Can anyone provide some enlightenment on the issue?

[Update 1] I tried to use "symfony demo", it shows up a similar error.