:PreviewMarkdown does not work on windows10

[itgoyo]

I run vim on Mac use :PreviewMarkdown work well

but when I run on Windows 10 ,it warns

To use Preview plugin you should compile vim with --enable-rubyinterp option

how to fix it？

:echo has('ruby')

return 0

I have install ruby on my pc

[keer2345]

I am using tthese plugin to work for markdown:

Plugin 'plasticboy/vim-markdown', {'name': 'plasticboy-vim-markdown'}
Plugin 'iamcco/mathjax-support-for-mkdp'
Plugin 'iamcco/markdown-preview.vim'
Plugin 'mzlogin/vim-markdown-toc'     "generate markdown's catalog

moreover, i unbundle these plugin in spf13's default  (maybe you no need to Unbundle those all) : 
UnBundle 'rust-lang/rust.vim'
UnBundle 'tpope/vim-markdown'
UnBundle 'spf13/vim-preview'
UnBundle 'tpope/vim-cucumber'
UnBundle 'cespare/vim-toml'
UnBundle 'quentindecock/vim-cucumber-align-pipes'
UnBundle 'saltstack/salt-vim'