我在Windows 10上使用Vagrant，需要两个插件：
无业游民：2.2.2
VirtualBox：6.0.0-127566
vagrant plugin install vagrant-vbguest
vagrant plugin install vagrant-winnfsd
有错误：
λ vagrant plugin install vagrant-vbguest
Installing the 'vagrant-vbguest' plugin. This can take a few minutes...
Vagrant failed to load a configured plugin source. This can be caused
by a variety of issues including: transient connectivity issues, proxy
filtering rejecting access to a configured plugin source, or a configured
plugin source not responding correctly. Please review the error message
below to help resolve the issue:
SSL_connect SYSCALL returned=5 errno=0 state=SSLv2/v3 read server hello A (https://gems.hashicorp.com/specs.4.8.gz)
Source: https://gems.hashicorp.com/
vagrant plugin install vagrant-winnfsd具有相同的错误。而且我可以通过浏览器访问https://gems.hashicorp.com/。
我该怎么办？