Make sure you have Redactor lisense

//= require redactor
//= require redactor/inlinestyle
//= require redactor/source
//= require redactor/codemirror
//= require redactor/alignment
//= require redactor/table
//= require redactor/fullscreen
//= require redactor/fontsize
//= require redactor/fontcolor
//= require redactor/fontfamily
//= require redactor/video
//= require redactor/imagemanager
//= require redactor/filemanager
//= require redactor/properties
//= require redactor/definedlinks
//= require redactor/clips
//= require redactor/limiter
//= require redactor/textdirection
//= require redactor/counter
//= require redactor/imagelink

@import "redactor";
@import "redactor/alignment";
@import "redactor/clips";

Example of an editor with all the plugins (except UploadCare):

$(function() {
  $('#redactor').redactor({
    plugins: ['inlinestyle', 'source', 'codemirror', 'alignment', 'table', 'fullscreen',
      'fontsize', 'fontcolor', 'fontfamily', 'video', 'imagemanager', 'filemanager',
      'properties', 'definedlinks', 'clips', 'limiter', 'textexpander', 'textdirection',
      'counter', 'imagelink'],
    codemirror: {
      lineNumbers: true,
      mode: 'xml',
      indentUnit: 4
    },
    imageUpload: '/upload.php',
    imageManagerJson: '/images/images.json',
    fileUpload: '/upload.php',
    fileManagerJson: '/files/files.json',
    definedLinks: '/defined-links.json',
    limiter: 20,
    textexpander: [
      ['lorem', 'Lorem ipsum...'],
      ['text', 'Text']
    ],
    callbacks: {
      counter: function(data) {
        console.log('Words: ' + data.words);
        console.log('Characters: ' + data.characters);
        console.log('Characters w/o spaces: ' + (data.characters - data.spaces));
      }
    }
  });
});