output of bundle exec jekyll serve after add octopress-multilingual gem

bundle_output

MacBook:levlas.github.io lev$ bundle exec jekyll serve
bundler: failed to load command: jekyll (/usr/local/bin/jekyll)
Bundler::GemRequireError: There was an error while trying to load the gem 'octopress-multilingual'.
Gem Load Error is: undefined method `template' for class `Jekyll::Post'
Backtrace for gem load error is:
/usr/local/lib/ruby/gems/2.4.0/gems/octopress-multilingual-1.2.0/lib/octopress-multilingual/jekyll.rb:85:in `<class:Post>'
/usr/local/lib/ruby/gems/2.4.0/gems/octopress-multilingual-1.2.0/lib/octopress-multilingual/jekyll.rb:84:in `<module:Jekyll>'
/usr/local/lib/ruby/gems/2.4.0/gems/octopress-multilingual-1.2.0/lib/octopress-multilingual/jekyll.rb:1:in `<top (required)>'
/usr/local/lib/ruby/gems/2.4.0/gems/octopress-multilingual-1.2.0/lib/octopress-multilingual.rb:9:in `require'
/usr/local/lib/ruby/gems/2.4.0/gems/octopress-multilingual-1.2.0/lib/octopress-multilingual.rb:9:in `<top (required)>'
/usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.14.3/lib/bundler/runtime.rb:91:in `require'
/usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.14.3/lib/bundler/runtime.rb:91:in `block (2 levels) in require'
/usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.14.3/lib/bundler/runtime.rb:86:in `each'
/usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.14.3/lib/bundler/runtime.rb:86:in `block in require'
/usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.14.3/lib/bundler/runtime.rb:75:in `each'
/usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.14.3/lib/bundler/runtime.rb:75:in `require'
/usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.14.3/lib/bundler.rb:107:in `require'
/usr/local/lib/ruby/gems/2.4.0/gems/jekyll-3.3.1/lib/jekyll/plugin_manager.rb:37:in `require_from_bundler'
/usr/local/lib/ruby/gems/2.4.0/gems/jekyll-3.3.1/exe/jekyll:9:in `<top (required)>'
/usr/local/bin/jekyll:22:in `load'
/usr/local/bin/jekyll:22:in `<top (required)>'
/usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.14.3/lib/bundler/cli/exec.rb:74:in `load'
/usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.14.3/lib/bundler/cli/exec.rb:74:in `kernel_load'
/usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.14.3/lib/bundler/cli/exec.rb:27:in `run'
/usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.14.3/lib/bundler/cli.rb:335:in `exec'
/usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.14.3/lib/bundler/vendor/thor/lib/thor/command.rb:27:in `run'
/usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.14.3/lib/bundler/vendor/thor/lib/thor/invocation.rb:126:in `invoke_command'
/usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.14.3/lib/bundler/vendor/thor/lib/thor.rb:359:in `dispatch'
/usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.14.3/lib/bundler/cli.rb:20:in `dispatch'
/usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.14.3/lib/bundler/vendor/thor/lib/thor/base.rb:440:in `start'
/usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.14.3/lib/bundler/cli.rb:11:in `start'
/usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.14.3/exe/bundle:32:in `block in <top (required)>'
/usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.14.3/lib/bundler/friendly_errors.rb:121:in `with_friendly_errors'
/usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.14.3/exe/bundle:24:in `<top (required)>'
/usr/local/bin/bundle:22:in `load'
/usr/local/bin/bundle:22:in `<main>'
Bundler Error Backtrace:

  /usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.14.3/lib/bundler/runtime.rb:94:in `rescue in block (2 levels) in require'
  /usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.14.3/lib/bundler/runtime.rb:90:in `block (2 levels) in require'
  /usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.14.3/lib/bundler/runtime.rb:86:in `each'
  /usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.14.3/lib/bundler/runtime.rb:86:in `block in require'
  /usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.14.3/lib/bundler/runtime.rb:75:in `each'
  /usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.14.3/lib/bundler/runtime.rb:75:in `require'
  /usr/local/lib/ruby/gems/2.4.0/gems/bundler-1.14.3/lib/bundler.rb:107:in `require'
  /usr/local/lib/ruby/gems/2.4.0/gems/jekyll-3.3.1/lib/jekyll/plugin_manager.rb:37:in `require_from_bundler'
  /usr/local/lib/ruby/gems/2.4.0/gems/jekyll-3.3.1/exe/jekyll:9:in `<top (required)>'
  /usr/local/bin/jekyll:22:in `load'
  /usr/local/bin/jekyll:22:in `<top (required)>'