Uncaught TypeError: Cannot read property 'getPanes' of undefined

[steview]

[Enter steps to reproduce below:]

1. ...
2. ...

Atom Version: 0.188.0
System: Mac OS X 10.10.2
Thrown From: layout-manager package, v0.2.3

Stack Trace

Uncaught TypeError: Cannot read property 'getPanes' of undefined

At /Users/stevenwake/.atom/packages/layout-manager/lib/layout-manager.coffee:76

TypeError: Cannot read property 'getPanes' of undefined
  at Object.module.exports.getRelativePane (/Users/stevenwake/.atom/packages/layout-manager/lib/layout-manager.coffee:76:33)
  at Object.module.exports.move (/Users/stevenwake/.atom/packages/layout-manager/lib/layout-manager.coffee:51:17)
  at Object.module.exports.moveLeft (/Users/stevenwake/.atom/packages/layout-manager/lib/layout-manager.coffee:32:17)
  at atom-workspace.<anonymous> (/Users/stevenwake/.atom/packages/layout-manager/lib/layout-manager.coffee:9:69)
  at atom-workspace.handler (/Applications/Atom.app/Contents/Resources/app/src/space-pen-extensions.js:115:32)
  at atom-workspace.jQuery.event.dispatch (/Applications/Atom.app/Contents/Resources/app/node_modules/space-pen/vendor/jquery.js:4681:9)
  at atom-workspace.elemData.handle (/Applications/Atom.app/Contents/Resources/app/node_modules/space-pen/vendor/jquery.js:4359:46)
  at CommandRegistry.module.exports.CommandRegistry.handleCommandEvent (/Applications/Atom.app/Contents/Resources/app/src/command-registry.js:242:29)
  at /Applications/Atom.app/Contents/Resources/app/src/command-registry.js:3:61
  at KeymapManager.module.exports.KeymapManager.dispatchCommandEvent (/Applications/Atom.app/Contents/Resources/app/node_modules/atom-keymap/lib/keymap-manager.js:558:16)
  at KeymapManager.module.exports.KeymapManager.handleKeyboardEvent (/Applications/Atom.app/Contents/Resources/app/node_modules/atom-keymap/lib/keymap-manager.js:396:22)
  at HTMLDocument.module.exports.WindowEventHandler.onKeydown (/Applications/Atom.app/Contents/Resources/app/src/window-event-handler.js:180:20)

Commands

  3x -1:22.6 core:undo (atom-text-editor.editor.is-focused)
 11x -1:19.9 layout-manager:enlarge-active-pane (atom-text-editor.editor.is-focused)
     -1:11.0 layout-manager:shrink-active-pane (atom-text-editor.editor.is-focused)
     -1:11.0 layout-manager:enlarge-active-pane (atom-text-editor.editor.is-focused)
     -1:10.8 layout-manager:shrink-active-pane (atom-text-editor.editor.is-focused)
     -1:10.6 layout-manager:enlarge-active-pane (atom-text-editor.editor.is-focused)
     -1:10.5 layout-manager:shrink-active-pane (atom-text-editor.editor.is-focused)
     -1:10.4 layout-manager:enlarge-active-pane (atom-text-editor.editor.is-focused)
     -1:10.3 layout-manager:shrink-active-pane (atom-text-editor.editor.is-focused)
  2x -1:10.1 layout-manager:enlarge-active-pane (atom-text-editor.editor.is-focused)
     -0:20.7 layout-manager:move-pane-left (atom-text-editor.editor)
     -0:20.0 layout-manager:move-pane-right (atom-text-editor.editor)
     -0:19.8 layout-manager:move-pane-left (atom-text-editor.editor)
     -0:19.7 layout-manager:move-pane-right (atom-text-editor.editor)
  2x -0:19.6 layout-manager:move-pane-left (atom-text-editor.editor)
     -0:00.7 layout-manager:move-pane-right (atom-text-editor.editor.is-focused)

Config

{
  "core": {
    "themes": [
      "one-dark-ui",
      "one-dark-syntax"
    ]
  }
}

Installed Packages

# User
language-rspec, v0.3.0
layout-manager, v0.2.3
rspec, v0.1.9
rspec-snippets, v0.4.0

# Dev
No dev packages