Jekyll serve doesn't open a port - ruby

Question

I recently installed Jekyll after a lot of trouble and when I run bundle exec jekyll serve this is the output:
Configuration file: /Users/Michelle/Desktop/hacked-by-chel/_config.yml
Source: /Users/Michelle/Desktop/hacked-by-chel
Destination: /Users/Michelle/Desktop/hacked-by-chel/_site
Incremental build: disabled. Enable with --incremental
Generating...
Jekyll Feed: Generating feed for posts
done in 1.12 seconds.
Auto-regeneration: enabled for '/Users/Michelle/Desktop/hacked-by-chel'
------------------------------------------------
Jekyll 4.1.1 Please append `--trace` to the `serve` command
for any additional information or backtrace.
------------------------------------------------
It doesn't open a port.
I tried running bundle exec jekyll serve --trace, the output is
Michelle#Michelles-MacBook-Pro hacked-by-chel % bundle exec jekyll serve --trace
Configuration file: /Users/Michelle/Desktop/hacked-by-chel/_config.yml
Source: /Users/Michelle/Desktop/hacked-by-chel
Destination: /Users/Michelle/Desktop/hacked-by-chel/_site
Incremental build: disabled. Enable with --incremental
Generating...
Jekyll Feed: Generating feed for posts
done in 0.948 seconds.
Auto-regeneration: enabled for '/Users/Michelle/Desktop/hacked-by-chel'
bundler: failed to load command: jekyll (/usr/local/bin/jekyll)
Errno::EADDRINUSE: Address already in use - bind(2) for 127.0.0.1:4000
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/socket.rb:201:in `bind'
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/socket.rb:201:in `listen'
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/socket.rb:764:in `block in tcp_server_
sockets'
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/socket.rb:227:in `each'
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/socket.rb:227:in `foreach'
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/socket.rb:762:in `tcp_server_sockets'
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/webrick/utils.rb:65:in `create_listene
rs'
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/webrick/server.rb:127:in `listen'
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/webrick/server.rb:108:in `initialize'
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/webrick/httpserver.rb:47:in `initializ
e'
/Library/Ruby/Gems/2.6.0/gems/jekyll-4.1.1/lib/jekyll/commands/serve.rb:215:in `new'
/Library/Ruby/Gems/2.6.0/gems/jekyll-4.1.1/lib/jekyll/commands/serve.rb:215:in `start_up_webrick'
/Library/Ruby/Gems/2.6.0/gems/jekyll-4.1.1/lib/jekyll/commands/serve.rb:102:in `process'
/Library/Ruby/Gems/2.6.0/gems/jekyll-4.1.1/lib/jekyll/command.rb:91:in `block in process_with_graceful_fail'
/Library/Ruby/Gems/2.6.0/gems/jekyll-4.1.1/lib/jekyll/command.rb:91:in `each'
/Library/Ruby/Gems/2.6.0/gems/jekyll-4.1.1/lib/jekyll/command.rb:91:in `process_with_graceful_fail'
/Library/Ruby/Gems/2.6.0/gems/jekyll-4.1.1/lib/jekyll/commands/serve.rb:86:in `block (2 levels) in init_with_pro
gram'
/Users/Michelle/.gem/ruby/2.6.0/gems/mercenary-0.4.0/lib/mercenary/command.rb:221:in `block in execute'
/Users/Michelle/.gem/ruby/2.6.0/gems/mercenary-0.4.0/lib/mercenary/command.rb:221:in `each'
/Users/Michelle/.gem/ruby/2.6.0/gems/mercenary-0.4.0/lib/mercenary/command.rb:221:in `execute'
/Users/Michelle/.gem/ruby/2.6.0/gems/mercenary-0.4.0/lib/mercenary/program.rb:44:in `go'
/Users/Michelle/.gem/ruby/2.6.0/gems/mercenary-0.4.0/lib/mercenary.rb:21:in `program'
/Library/Ruby/Gems/2.6.0/gems/jekyll-4.1.1/exe/jekyll:15:in `<top (required)>'
/usr/local/bin/jekyll:23:in `load'
/usr/local/bin/jekyll:23:in `<top (required)>'
I also tried running jekyll --version and it says
The dependency tzinfo (~> 1.2) will be unused by any of the platforms Bundler is installing for. Bundler is installing for ruby
but the dependency is only for x86-mingw32, x64-mingw32, x86-mswin32, java. To add those platforms to the bundle, run `bundle
lock --add-platform x86-mingw32 x64-mingw32 x86-mswin32 java`.
The dependency tzinfo-data (>= 0) will be unused by any of the platforms Bundler is installing for. Bundler is installing for r
uby but the dependency is only for x86-mingw32, x64-mingw32, x86-mswin32, java. To add those platforms to the bundle, run `bund
le lock --add-platform x86-mingw32 x64-mingw32 x86-mswin32 java`.
The dependency wdm (~> 0.1.1) will be unused by any of the platforms Bundler is installing for. Bundler is installing for ruby
but the dependency is only for x86-mingw32, x64-mingw32, x86-mswin32. To add those platforms to the bundle, run `bundle lock --
add-platform x86-mingw32 x64-mingw32 x86-mswin32`.
jekyll 4.1.1
How do I make Jekyll run?

Answer 1

Address already in use - bind(2) for 127.0.0.1:4000 check if any process using that port or using a different port:
jekyll serve --port 4001