Vagrant up 启动失败我用了 Vagrant destroy 删除了 我又重新配置了一次但是出现了如下问题

$ vagrant up
C:/HashiCorp/Vagrant/embedded/mingw64/lib/ruby/2.4.0/psych.rb:377:in parse': (<unknown>): did not find expected key while parsing a block mapping at line 2 column 1 (Psych::SyntaxError) from C:/HashiCorp/Vagrant/embedded/mingw64/lib/ruby/2.4.0/psych.rb:377:inparse_stream'
from C:/HashiCorp/Vagrant/embedded/mingw64/lib/ruby/2.4.0/psych.rb:325:in parse' from C:/HashiCorp/Vagrant/embedded/mingw64/lib/ruby/2.4.0/psych.rb:252:inload'
from C:/Users/zz/Homestead/Vagrantfile:28:in block in <top (required)>' from C:/HashiCorp/Vagrant/embedded/gems/2.1.1/gems/vagrant-2.1.1/lib/vagrant/config/v2/loader.rb:37:inload'
from C:/HashiCorp/Vagrant/embedded/gems/2.1.1/gems/vagrant-2.1.1/lib/vagrant/config/loader.rb:126:in block (2 levels) in load' from C:/HashiCorp/Vagrant/embedded/gems/2.1.1/gems/vagrant-2.1.1/lib/vagrant/config/loader.rb:119:ineach'
from C:/HashiCorp/Vagrant/embedded/gems/2.1.1/gems/vagrant-2.1.1/lib/vagrant/config/loader.rb:119:in block in load' from C:/HashiCorp/Vagrant/embedded/gems/2.1.1/gems/vagrant-2.1.1/lib/vagrant/config/loader.rb:116:ineach'
from C:/HashiCorp/Vagrant/embedded/gems/2.1.1/gems/vagrant-2.1.1/lib/vagrant/config/loader.rb:116:in load' from C:/HashiCorp/Vagrant/embedded/gems/2.1.1/gems/vagrant-2.1.1/lib/vagrant/vagrantfile.rb:28:ininitialize'
from C:/HashiCorp/Vagrant/embedded/gems/2.1.1/gems/vagrant-2.1.1/lib/vagrant/environment.rb:777:in new' from C:/HashiCorp/Vagrant/embedded/gems/2.1.1/gems/vagrant-2.1.1/lib/vagrant/environment.rb:777:invagrantfile'
from C:/HashiCorp/Vagrant/embedded/gems/2.1.1/gems/vagrant-2.1.1/lib/vagrant/environment.rb:523:in host' from C:/HashiCorp/Vagrant/embedded/gems/2.1.1/gems/vagrant-2.1.1/lib/vagrant/environment.rb:191:inblock in action_runner'
from C:/HashiCorp/Vagrant/embedded/gems/2.1.1/gems/vagrant-2.1.1/lib/vagrant/action/runner.rb:33:in run' from C:/HashiCorp/Vagrant/embedded/gems/2.1.1/gems/vagrant-2.1.1/lib/vagrant/environment.rb:510:inhook'
from C:/HashiCorp/Vagrant/embedded/gems/2.1.1/gems/vagrant-2.1.1/lib/vagrant/environment.rb:759:in unload' from C:/HashiCorp/Vagrant/embedded/gems/2.1.1/gems/vagrant-2.1.1/bin/vagrant:159:inensure in '
from C:/HashiCorp/Vagrant/embedded/gems/2.1.1/gems/vagrant-2.1.1/bin/vagrant:159:in `'
不知道如何解决

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