Hi, I'm trying to preview using the bundle for my markdown, but I get the following error:

/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in require': cannot load such file -- bundler/setup (LoadError)
	from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in require'
	from /Users/rachelyen/Library/Application Support/TextMate/Bundles/GFM-Preview.tmbundle/Support/gfm.rb:2:in <main>'

I'm on a mac and I'm using the homebrewed installed version of Ruby. I was reading online maybe it's having more than one version of ruby on my machine that's giving issues?