3Jekyll .1.6 does not serve on Ubuntu: undefined method `bash_on_windows?' for Jekyll:: Utils:: Platforms: Module

Question

I installed jekyll

sudo gem install jekyll

And then I go into my GitHub repo folder (which has file index.html) and

jekyll serve

But it generates error:

/var/lib/gems/2.5.0/gems/jekyll-3.8.5/lib/jekyll/drops/document_drop.rb:8: warning: already initialized constant

Jekyll::Drops::DocumentDrop::NESTED_OBJECT_FIELD_BLACKLIST

/usr/lib/ruby/vendor_ruby/jekyll/drops/document_drop.rb:8: warning: previous definition of NESTED_OBJECT_FIELD_BLACKLIST was here

/var/lib/gems/2.5.0/gems/jekyll-3.8.5/lib/jekyll/drops/drop.rb:8: warning: already initialized constant Jekyll::Drops::Drop::NON_CONTENT_METHODS

/usr/lib/ruby/vendor_ruby/jekyll/drops/drop.rb:8: warning: previous definition of NON_CONTENT_METHODS was here

Configuration file: none

Configuration file: none

Configuration file: none

        Source: /home/chi/eivorjussila.github.io

   Destination: /home/chi/eivorjussila.github.io/_site

Incremental build: disabled. Enable with --incremental

 Generating... 

               done in 0.095 seconds.

jekyll 3.1.6 | Error: undefined method `bash_on_windows?' for Jekyll::Utils::Platforms:Module

Anyone knows why?

Answer 1

it seems that i have 2 versions of jekyll. so what i did was to sudo apt remove jekyll sudo apt-get --autoremove which jekyll sudo rm /bin../jekyll

and then i reinstall it sudo gem install jekyll it works now