select2 docs error

grunt docs
Running "symlink:docs" (symlink) task
>> Destination docs/dist/css already exists.
>> Destination docs/dist/js already exists.
>> Created 0 symbolic links.

Running "jekyll:serve" (jekyll) task
`jekyll serve --source docs --destination docs/_site --watch` was initiated.

Started Jekyll web server on http://localhost:4000. Waiting...
Configuration file: none
Configuration file: none
            Source: docs
       Destination: docs/_site
 Incremental build: disabled. Enable with --incremental
      Generating... 
                    done in 1.325 seconds.
 Auto-regeneration: enabled for 'docs'
Configuration file: none
    Server address: http://127.0.0.1:4000/
  Server running... press ctrl-c to stop.
[2016-10-12 13:48:04] ERROR `/vendor/js/jquery.min.js' not found.
[2016-10-12 13:48:04] ERROR `/vendor/js/anchor.min.js' not found.
[2016-10-12 13:48:04] ERROR `/vendor/js/prettify.min.js' not found.
[2016-10-12 13:48:04] ERROR `/vendor/js/bootstrap.min.js' not found.
[2016-10-12 13:48:18] ERROR `/vendor/js/jquery.min.js' not found.
[2016-10-12 13:48:18] ERROR `/vendor/js/bootstrap.min.js' not found.
[2016-10-12 13:48:18] ERROR `/vendor/js/anchor.min.js' not found.
[2016-10-12 13:48:18] ERROR `/vendor/js/prettify.min.js' not found.
[2016-10-12 13:48:18] ERROR `/vendor/js/placeholders.jquery.min.js' not found.
      Regenerating: 1 file(s) changed at 2016-10-12 13:49:11 ...done in 1.707488826 seconds.
[2016-10-12 13:49:14] ERROR `/vendor/js/jquery.min.js' not found.
[2016-10-12 13:49:14] ERROR `/vendor/js/anchor.min.js' not found.
[2016-10-12 13:49:14] ERROR `/vendor/js/bootstrap.min.js' not found.
[2016-10-12 13:49:14] ERROR `/vendor/js/prettify.min.js' not found.
[2016-10-12 13:49:15] ERROR `/docs/vendor/js/placeholders.jquery.min.js' not found.