Apa yang berlaku

Beberapa masa lalu, saya belajar laravel dan memasang homestead pada MAC (Sierra versi 10.12) Semuanya berfungsi dengan baik. Hanya laksanakannya selepas but tertentu homestead up 就报错了，执行homestead status 也是报错，而且报错内容一样
但是我执行 homestead --version 、 homestead edit 就没问题
于是我就想是不是 homestead 环境出问题了 ，于是我执行
vagrant box remove laravel/homestead
想把 homestead 删除重装。但是 vagrant 也报错了。于是我就想是不是 vagrant 出问题了 于是我想把vagrant 删了 于是我执行 vagrant destroyIa masih melaporkan ralat

Mesej ralat adalah seperti berikut

Apabila melaksanakan arahan homestead, ralat berikut dilaporkan

cottondeMacBook-Pro:bin cotton$ homestead up
/opt/vagrant/embedded/lib/ruby/2.2.0/psych.rb:370:in `parse': (<unknown>): mapping values are not allowed in this context at line 2 column 3 (Psych::SyntaxError)
    from /opt/vagrant/embedded/lib/ruby/2.2.0/psych.rb:370:in `parse_stream'
    from /opt/vagrant/embedded/lib/ruby/2.2.0/psych.rb:318:in `parse'
    from /opt/vagrant/embedded/lib/ruby/2.2.0/psych.rb:245:in `load'
    from /Users/cotton/.composer/vendor/laravel/homestead/Vagrantfile:20:in `block in <top (required)>'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/config/v2/loader.rb:37:in `call'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/config/v2/loader.rb:37:in `load'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/config/loader.rb:113:in `block (2 levels) in load'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/config/loader.rb:107:in `each'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/config/loader.rb:107:in `block in load'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/config/loader.rb:104:in `each'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/config/loader.rb:104:in `load'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/vagrantfile.rb:28:in `initialize'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/environment.rb:746:in `new'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/environment.rb:746:in `vagrantfile'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/environment.rb:492:in `host'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/environment.rb:214:in `block in action_runner'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/action/runner.rb:33:in `call'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/action/runner.rb:33:in `run'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/environment.rb:479:in `hook'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/environment.rb:728:in `unload'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/bin/vagrant:177:in `ensure in <main>'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/bin/vagrant:177:in `<main>'

Apabila melaksanakan gelandangan mesej ralat adalah seperti berikut

cottondeMacBook-Pro:bin cotton$ vagrant box remove laravel/homestead
/opt/vagrant/embedded/lib/ruby/2.2.0/psych.rb:370:in `parse': (<unknown>): mapping values are not allowed in this context at line 2 column 3 (Psych::SyntaxError)
    from /opt/vagrant/embedded/lib/ruby/2.2.0/psych.rb:370:in `parse_stream'
    from /opt/vagrant/embedded/lib/ruby/2.2.0/psych.rb:318:in `parse'
    from /opt/vagrant/embedded/lib/ruby/2.2.0/psych.rb:245:in `load'
    from /Users/cotton/.composer/vendor/laravel/homestead/Vagrantfile:20:in `block in <top (required)>'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/config/v2/loader.rb:37:in `call'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/config/v2/loader.rb:37:in `load'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/config/loader.rb:113:in `block (2 levels) in load'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/config/loader.rb:107:in `each'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/config/loader.rb:107:in `block in load'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/config/loader.rb:104:in `each'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/config/loader.rb:104:in `load'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/vagrantfile.rb:28:in `initialize'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/environment.rb:746:in `new'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/environment.rb:746:in `vagrantfile'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/environment.rb:669:in `machine'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/machine_index.rb:441:in `valid?'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/action/builtin/box_remove.rb:82:in `block (2 levels) in call'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/action/builtin/box_remove.rb:82:in `each'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/action/builtin/box_remove.rb:82:in `find_all'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/action/builtin/box_remove.rb:82:in `block in call'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/action/builtin/box_remove.rb:75:in `each'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/action/builtin/box_remove.rb:75:in `call'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/action/warden.rb:34:in `call'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/action/builder.rb:116:in `call'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/action/runner.rb:66:in `block in run'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/util/busy.rb:19:in `busy'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/action/runner.rb:66:in `run'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/plugins/commands/box/command/remove.rb:52:in `execute'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/plugins/commands/box/command/root.rb:61:in `execute'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/cli.rb:42:in `execute'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/lib/vagrant/environment.rb:308:in `cli'
    from /opt/vagrant/embedded/gems/gems/vagrant-1.8.6/bin/vagrant:174:in `<main>'

Akhir sekali, saya menyemak di mana arahan melaporkan ralat pertama
/opt/vagrant/embedded/lib/ruby/2.2.0/psych.rb:370: dalam `parse': (<unknown>): nilai pemetaan ​​tidak dibenarkan dalam konteks ini di baris 2 lajur 3 (Psych::SyntaxError)

def self.parse_stream yaml, filename = nil, &block
368     if block_given?
369       parser = Psych::Parser.new(Handlers::DocumentStream.new(&block))
370       parser.parse yaml, filename
371     else
372       parser = self.parser
373       parser.parse yaml, filename
374       parser.handler.root
375     end

Saya juga tidak faham ruby ​​​​, sila lihat di dalamnya