Hi, jekyll serve is not working. Below is the output.
/usr/local/Cellar/ruby/2.4.1_1/lib/ruby/2.4.0/rubygems.rb:270:in `find_spec_for_exe': can't find gem jekyll (>= 0.a) (Gem::GemNotFoundException)
from /usr/local/Cellar/ruby/2.4.1_1/lib/ruby/2.4.0/rubygems.rb:298:in `activate_bin_path'
from /usr/local/bin/jekyll:22:in `<main>'