bundle

% jekyll s
Traceback (most recent call last):
10: from /usr/local/bin/jekyll:23:in <main>'
9: from /usr/local/bin/jekyll:23:in load’
8: from /Library/Ruby/Gems/2.6.0/gems/jekyll-4.1.1/exe/jekyll:11:in <top (required)>'
7: from /Library/Ruby/Gems/2.6.0/gems/jekyll-4.1.1/lib/jekyll/plugin_manager.rb:52:in require_from_bundler’
6: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/bundler.rb:107:in setup'
5: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/bundler/runtime.rb:26:in setup’
4: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/bundler/runtime.rb:26:in map'
3: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/forwardable.rb:230:in each’
2: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/forwardable.rb:230:in each'
1: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/bundler/runtime.rb:31:in block in setup’
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/bundler/runtime.rb:319:in check_for_activated_spec!': You have already activated public_suffix 4.0.6, but your Gemfile requires public_suffix 3.1.1. Prepending bundle exec` to your command may solve this. (Gem::LoadError)

% bundle update

% bundle exec jekyll s
Configuration file: /Users/didi/blog/MyBlog/_config.yml
Source: /Users/didi/blog/MyBlog
Destination: /Users/didi/blog/MyBlog/_site
Incremental build: disabled. Enable with –incremental
Generating…
Jekyll Feed: Generating feed for posts
done in 121.153 seconds.
Auto-regeneration: enabled for ‘/Users/didi/blog/MyBlog’
Server address: http://127.0.0.1:4000/MyBlog/
Server running… press ctrl-c to stop.