The complete error message is as follows:

LinkChecker: [Warning]
                    done in 13.838 seconds.
 Auto-regeneration: enabled for 'D:/WorkDir/Repository/GitHub/opensearch/documentation-website'
                    ------------------------------------------------
      Jekyll 4.2.1   Please append `--trace` to the `serve` command
                     for any additional information or backtrace.
                    ------------------------------------------------
D:/DKits/Ruby/lib/ruby/gems/3.0.0/gems/jekyll-4.2.1/lib/jekyll/commands/serve/servlet.rb:3:in `require': cannot load such file -- webrick (LoadError)
        from D:/DKits/Ruby/lib/ruby/gems/3.0.0/gems/jekyll-4.2.1/lib/jekyll/commands/serve/servlet.rb:3:in `<top (required)>'
        from D:/DKits/Ruby/lib/ruby/gems/3.0.0/gems/jekyll-4.2.1/lib/jekyll/commands/serve.rb:179:in `require_relative'
        from D:/DKits/Ruby/lib/ruby/gems/3.0.0/gems/jekyll-4.2.1/lib/jekyll/commands/serve.rb:179:in `setup'
        from D:/DKits/Ruby/lib/ruby/gems/3.0.0/gems/jekyll-4.2.1/lib/jekyll/commands/serve.rb:100:in `process'
        from D:/DKits/Ruby/lib/ruby/gems/3.0.0/gems/jekyll-4.2.1/lib/jekyll/command.rb:91:in `block in process_with_graceful_fail'
        from D:/DKits/Ruby/lib/ruby/gems/3.0.0/gems/jekyll-4.2.1/lib/jekyll/command.rb:91:in `each'
        from D:/DKits/Ruby/lib/ruby/gems/3.0.0/gems/jekyll-4.2.1/lib/jekyll/command.rb:91:in `process_with_graceful_fail'
        from D:/DKits/Ruby/lib/ruby/gems/3.0.0/gems/jekyll-4.2.1/lib/jekyll/commands/serve.rb:86:in `block (2 levels) in init_with_program'
        from D:/DKits/Ruby/lib/ruby/gems/3.0.0/gems/mercenary-0.4.0/lib/mercenary/command.rb:221:in `block in execute'
        from D:/DKits/Ruby/lib/ruby/gems/3.0.0/gems/mercenary-0.4.0/lib/mercenary/command.rb:221:in `each'
        from D:/DKits/Ruby/lib/ruby/gems/3.0.0/gems/mercenary-0.4.0/lib/mercenary/command.rb:221:in `execute'
        from D:/DKits/Ruby/lib/ruby/gems/3.0.0/gems/mercenary-0.4.0/lib/mercenary/program.rb:44:in `go'
        from D:/DKits/Ruby/lib/ruby/gems/3.0.0/gems/mercenary-0.4.0/lib/mercenary.rb:21:in `program'
        from D:/DKits/Ruby/lib/ruby/gems/3.0.0/gems/jekyll-4.2.1/exe/jekyll:15:in `<top (required)>'
        from D:/DKits/Ruby/bin/jekyll:23:in `load'
        from D:/DKits/Ruby/bin/jekyll:23:in `<main>'

Problems and Solutions

According to the official project description:

This is because:
webrick has not been bound to Ruby since Ruby 3.0. Please refer to the link:   Ruby 3.0.0 Released   Description in.

Webrick needs to be added manually.

The added commands are:

bundle add webrick

Then we can solve the problem.

When Jekyll runs, it will prompt an error. Cannot load such file — webrick (LoadError) – Open Source – ossez