Uncaught TypeError: Cannot read property 'detach' of undefined

[monlone]

[Enter steps to reproduce below:]

1. ...
2. ...

Atom Version: 1.3.2 System: Unknown Windows Version Thrown From: atom-alignment package, v0.12.1

Stack Trace

Uncaught TypeError: Cannot read property 'detach' of undefined

At /C:/Users/shaohua/.atom/packages/php-class-tree/lib/php-class-tree.coffee:44

TypeError: Cannot read property 'detach' of undefined
    at PhpClassTree.detach (file:///C:/Users/shaohua/.atom/packages/php-class-tree/lib/php-class-tree.coffee:34:14)
    at Function.Main.getPhpClassTreeByEditor (file:///C:/Users/shaohua/.atom/packages/php-class-tree/lib/php-class-tree.coffee:245:17)
    at file:///C:/Users/shaohua/.atom/packages/php-class-tree/lib/php-class-tree.coffee:212:22
    at Emitter.module.exports.Emitter.emit (D:\Atom\resources\app.asar\node_modules\event-kit\lib\emitter.js:86:11)
    at D:\Atom\resources\app.asar\src\pane-container.js:333:27
    at Emitter.module.exports.Emitter.emit (D:\Atom\resources\app.asar\node_modules\event-kit\lib\emitter.js:86:11)
    at Pane.module.exports.Pane.setActiveItem (D:\Atom\resources\app.asar\src\pane.js:248:22)
    at Pane.module.exports.Pane.activateItem (D:\Atom\resources\app.asar\src\pane.js:316:21)
    at atom-tabs.TabBarView.onMouseDown (D:\Atom\resources\app.asar\node_modules\tabs\lib\tab-bar-view.js:670:19)

Commands

Config

{
  "core": {
    "disabledPackages": [
      "atom-autocomplete-php"
    ]
  }
}

Installed Packages

# User
atom-alignment, v0.12.1
atom-beautify, v0.28.19
autocomplete-php, v0.3.7
color-picker, v2.0.14
docblockr, v0.7.3
emmet, v2.3.17
jsformat, v0.9.0
language-blade, v0.16.0
laravel, v0.7.0
laravel-snippets, v2.1.0
minimap, v4.18.2
php-cs-fixer, v2.5.1
php-debug, v0.1.4
pigments, v0.19.3
symbols-tree-view, v0.10.1
travis-ci-status, v0.18.0
vim-mode, v0.64.0

# Dev
No dev packages

[unoframille]

.