mantrajs-atom-package Uncaught TypeError: Cannot read property 'expand' of undefined

[Enter steps to reproduce below:]

Enable: CTRL-ALT-O
Click a collection file in Configs -> lib -> collections

Atom Version: 1.7.4 System: Mac OS X 10.11.5 Thrown From: mantrajs package, v0.4.4

Stack Trace

Uncaught TypeError: Cannot read property 'expand' of undefined

At /Users/Nadeem/.atom/packages/mantrajs/lib/directoryHandler.coffee:87

TypeError: Cannot read property 'expand' of undefined
    at Function.module.exports.DirectoryHandler.revealActiveFile (/Users/Nadeem/.atom/packages/mantrajs/lib/directoryHandler.coffee:87:15)
    at HTMLLIElement.<anonymous> (/Users/Nadeem/.atom/packages/mantrajs/lib/mantra-pane-view.coffee:65:24)
    at HTMLLIElement.jQuery.event.dispatch (/Users/Nadeem/.atom/packages/mantrajs/node_modules/space-pen/vendor/jquery.js:4681:9)
    at HTMLLIElement.elemData.handle (/Users/Nadeem/.atom/packages/mantrajs/node_modules/space-pen/vendor/jquery.js:4359:28)

Commands

     -1:06.2.0 application:add-project-folder (atom-text-editor.editor.is-focused)
     -0:59.9.0 command-palette:toggle (atom-text-editor.editor.is-focused)
     -0:56.3.0 editor:consolidate-selections (atom-text-editor.editor.mini.is-focused)
     -0:56.3.0 core:cancel (atom-text-editor.editor.mini.is-focused)
  3x -0:50.2.0 mantrajs:toggle (atom-text-editor.editor.is-focused)

Config

{
  "core": {
    "disabledPackages": [
      "spell-check"
    ],
    "packagesWithKeymapsDisabled": [
      "atom-lupa",
      "tool-bar",
      "sync-settings",
      "atom-ternjs"
    ]
  }
}

Installed Packages

# User
Quick-JavaScript, v0.16.0
atom-bracket-highlight, v0.3.1
atom-ternjs, v0.14.1
autocomplete-modules, v1.4.1
docblockr, v0.7.3
emmet, v2.4.3
emmet-snippets-compatibility, v1.0.6
formatter, v2.12.3
formatter-jsbeautify, v1.0.2
highlight-column, v0.5.1
highlight-line, v0.11.1
language-babel, v2.24.1
lebab-convert, v0.9.0
linter, v1.11.4
linter-codeclimate, v0.1.2
linter-eslint, v7.2.2
linter-jscs, v4.0.2
mantrajs, v0.4.4
meteor-api, v2.20.0
opened-files, v0.3.6
react, v0.15.0
sync-settings, v0.7.2
tool-bar, v0.4.0
tool-bar-almighty, v0.6.1
underscorejs-snippets, v0.2.2

# Dev
No dev packages