之前一直启动正常，突然一天启动的时候报了如下错误。通过各种尝试，在vagrantfile中添加了如下代码后便可启动了。
报错
$ vagrant up
Bringing machine 'default' up with 'virtualbox' provider...
==> default: Checking if box 'centos/7' version '1902.01' is up to date...
==> default: Clearing any previously set forwarded ports...
==> default: Clearing any previously set network interfaces...
==> default: Preparing network interfaces based on configuration...
default: Adapter 1: nat
default: Adapter 2: hostonly
==> default: Forwarding ports...
default: 22 (guest) => 2221 (host) (adapter 1)
==> default: Booting VM...
==> default: Waiting for machine to boot. This may take a few minutes...
default: SSH address: 127.0.0.1:2221
default: SSH username: vagrant
default: SSH auth method: private key
==> default: Machine booted and ready!
[default] GuestAdditions 5.2.22 running --- OK.
==> default: Checking for guest additions in VM...
==> default: Configuring and enabling network interfaces...
==> default: Rsyncing folder: /cygdrive/c/myvagrant/Borg-web/borg/ => /vagrant
C:/HashiCorp/Vagrant/embedded/gems/2.2.5/gems/vagrant-2.2.5/lib/vagrant/util/io.rb:32:in `encode': "x83xBC" from Windows-31J to UTF-8 (Encoding::UndefinedConversionError)
from C:/HashiCorp/Vagrant/embedded/gems/2.2.5/gems/vagrant-2.2.5/lib/vagrant/util/io.rb:32:in `read_until_block'
from C:/HashiCorp/Vagrant/embedded/gems/2.2.5/gems/vagrant-2.2.5/lib/vagrant/util/subprocess.rb:194:in `block in execute'
from C:/HashiCorp/Vagrant/embedded/gems/2.2.5/gems/vagrant-2.2.5/lib/vagrant/util/subprocess.rb:192:in `each'
from C:/HashiCorp/Vagrant/embedded/gems/2.2.5/gems/vagrant-2.2.5/lib/vagrant/util/subprocess.rb:192:in `execute'
from C:/HashiCorp/Vagrant/embedded/gems/2.2.5/gems/vagrant-2.2.5/lib/vagrant/util/subprocess.rb:22:in `execute'
from C:/HashiCorp/Vagrant/embedded/gems/2.2.5/gems/vagrant-2.2.5/plugins/synced_folders/rsync/helper.rb:215:in `rsync_single'
from C:/HashiCorp/Vagrant/embedded/gems/2.2.5/gems/vagrant-2.2.5/plugins/synced_folders/rsync/synced_folder.rb:48:in `block in enable'
from C:/HashiCorp/Vagrant/embedded/gems/2.2.5/gems/vagrant-2.2.5/plugins/synced_folders/rsync/synced_folder.rb:47:in `each'
from C:/HashiCorp/Vagrant/embedded/gems/2.2.5/gems/vagrant-2.2.5/plugins/synced_folders/rsync/synced_folder.rb:47:in `enable'
from C:/HashiCorp/Vagrant/embedded/gems/2.2.5/gems/vagrant-2.2.5/lib/vagrant/action/builtin/synced_folders.rb:93:in `block in call'
from C:/HashiCorp/Vagrant/embedded/gems/2.2.5/gems/vagrant-2.2.5/lib/vagrant/action/builtin/synced_folders.rb:90:in `each'
from C:/HashiCorp/Vagrant/embedded/gems/2.2.5/gems/vagrant-2.2.5/lib/vagrant/action/builtin/synced_folders.rb:90:in `call'
from C:/HashiCorp/Vagrant/embedded/gems/2.2.5/gems/vagrant-2.2.5/lib/vagrant/action/warden.rb:50:in `call'
from C:/HashiCorp/Vagrant/embedded/gems/2.2.5/gems/vagrant-2.2.5/lib/vagrant/action/builtin/before_trigger.rb:23:in `call'
from C:/HashiCorp/Vagrant/embedded/gems/2.2.5/gems/vagrant-2.2.5/lib/vagrant/action/warden.rb:50:in `call'
from C:/HashiCorp/Vagrant/embedded/gems/2.2.5/gems/vagrant-2.2.5/lib/vagrant/action/builtin/after_trigger.rb:26:in `call'
from C:/HashiCorp/Vagrant/embedded/gems/2.2.5/gems/vagrant-2.2.5/lib/vagrant/action/warden.rb:50:in `call'
from C:/HashiCorp/Vagrant/embedded/gems/2.2.5/gems/vagrant-2.2.5/lib/vagrant/action/builtin/synced_folder_cleanup.rb:28:in `call'
from C:/HashiCorp/Vagrant/embedded/gems/2.2.5/gems/vagrant-2.2.5/lib/vagrant/action/warden.rb:50:in `call'
from C:/HashiCorp/Vagrant/embedded/gems/2.2.5/gems/vagrant-2.2.5/lib/vagrant/action/builtin/before_trigger.rb:23:in `call'
from C:/HashiCorp/Vagrant/embedded/gems/2.2.5/gems/vagrant-2.2.5/lib/vagrant/action/warden.rb:50:in `call'
from C:/HashiCorp/Vagrant/embedded/gems/2.2.5/gems/vagrant-2.2.5/lib/vagrant/action/builtin/after_trigger.rb:26:in `call'
from C:/HashiCorp/Vagrant/embedded/gems/2.2.5/gems/vagrant-2.2.5/lib/vagrant/action/warden.rb:50:in `call'
from C:/HashiCorp/Vagrant/embedded/gems/2.2.5/gems/vagrant-2.2.5/plugins/synced_folders/nfs/action_cleanup.rb:19:in `call'
Vagrantfile中添加代码 Encoding.default_external = 'UTF-8'
Vagrant.configure("2") do |config|
# The most common configuration options are documented and commented below.
# For a complete reference, please see the online documentation at
# https://docs.vagrantup.com.
# Every Vagrant development environment requires a box. You can search for
# boxes at https://vagrantcloud.com/search.
config.vm.box = "centos/7"
Encoding.default_external = 'UTF-8'
# Disable automatic box update checking. If you disable this, then
# boxes will only be checked for updates when the user runs