我正在尝试安装fbctf并遇到错误。我已经从GitHub下载了fbctf。还下载了virtualbox并安装了无业游民。当我输入以下命令时，出现错误。 vagrant up-我被困在无所事事的阶段。有人可以帮我安装吗？
C:\Users\jan\Desktop\CTF>vagrant up
Bringing machine 'default' up with 'virtualbox' provider...
==> default: Box 'base' 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 'base' (v0) for provider: virtualbox
default: Downloading: base
default:
An error occurred while downloading the remote file. The error
message, if any, is reproduced below. Please fix this error and try
again.
Couldn't open file /C:/Users/jan/Desktop/CTF/base