Vagrant '；流浪者上'；给出'；下载'；时出错；

我在Linux和OS X机器上使用Vagrant没有问题。 现在，在Windows 10（带Bash for Windows的预览版）上，它在下载“我的盒子”时失败，但没有指定正确的错误消息：

Bringing machine 'default' up with 'virtualbox' provider...
==> default: Box 'trusty' could not be found. Attempting to find and install...
    default: Box Provider: virtualbox
    default: Box Version: >= 0
==> default: Box file was not detected as metadata. Adding it directly...
==> default: Adding box 'trusty' (v0) for provider: virtualbox
    default: Downloading: http://cloud-images.ubuntu.com/vagrant/trusty/current/trusty-server-cloudimg-amd64-vagrant-disk1.box
    default:
An error occurred while downloading the remote file. The error
message, if any, is reproduced below. Please fix this error and try
again.

我还尝试下载该框（因此URL是正确的！）并手动添加，但结果相同：

C:\> vagrant box add ubuntu/trusty64 c:\Users\michi\boxes\trusty-server-cloudimg-amd64-vagrant-disk1.box
==> box: Box file was not detected as metadata. Adding it directly...
==> box: Adding box 'ubuntu/trusty64' (v0) for provider:
    box: Unpacking necessary files from: file://c:/Users/michi/boxes/trusty-server-cloudimg-amd64-vagrant-disk1.box
    box:
An error occurred while downloading the remote file. The error
message, if any, is reproduced below. Please fix this error and try
again.

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我在这个github问题上找到了答案：

我安装了Waggrant，并立即启动了它