我正在尝试使用虚拟机设置虚拟机。我的Windows 7 64位机器上安装了虚拟盒和流浪汉。我还用puphpet建立了一个环境。但每当我尝试安装盒子ubuntu1404-x64时，它都会抛出错误
Bringing machine 'machine1' up with 'virtualbox' provider...
==>Machine1: Box 'puphpet/ubuntu1404-x64' could not be found. Attempting to find and install...
machine1: Box Provider: virtualbox
machine1: Box Version: >= 0
machine1: Box file was not detected as metadata. Adding it directly...
machine1: Adding box 'puphpet/ubuntu1404-x64' (v0) for provider: virtualbox
machine1: Downloading: puphpet/boxes/ubuntu1404-x64
machine1:
An error occurred while downloading the remote file. The error message, if any, is reproduced below. Please fix this error and try again.
我检查了网址https://atlas.hashicorp.com/puphpet/boxes/ubuntu1404-x64/，并且puphpet / ubuntu1404-x64框确实存在。
当它显示The error message, if any, is reproduced below时，它不会在终端显示任何描述。
我用Google搜索了问题，在stackoverflow尝试了一些答案，但没有结果。请帮忙。