jekyll 3.3.1 | Error: Could not find a JavaScript runtime.

[kulong0105]

phenomenon:

    [renyl@localhost kulong0105.github.io]$ bundle exec jekyll s
    Configuration file: /home/renyl/Downloads/blog/kulong0105.github.io/_config.yml
    Configuration file: /home/renyl/Downloads/blog/kulong0105.github.io/_config.yml
    jekyll 3.3.1 | Error:  Could not find a JavaScript runtime. See https://github.com/rails/execjs for a list of available runtimes.
    [renyl@localhost kulong0105.github.io]$

add two dep pkgs to fix the error info: ( refer to jekyll/jekyll#2327)

diff --git a/Gemfile b/Gemfile
index 782f366..669bedc 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,3 +1,5 @@
 source 'https://rubygems.org'
 gem 'github-pages', group: :jekyll_plugins
 gem 'redcarpet', "3.3.3"
+gem 'execjs'
+gem 'therubyracer'

[gsantner]

I used and developed on the theme today, but couldn't find this issue. Updating to the latest gems (bundle install) and bundle exec jekyll serve should resolve your problem