Uncaught TypeError: Cannot read property 'trim' of undefined

[eilvelia]

After clicking on the arrow (to collapse code block) with the alt, an error occurs.

Atom: 1.18.0 x64
Electron: 1.3.15
OS: Mac OS X 10.12.4
Thrown From: nav-panel-plus package 0.3.2

Stack Trace

Uncaught TypeError: Cannot read property 'trim' of undefined

At /Users/<username>/.atom/packages/nav-panel-plus/lib/nav-view.coffee:438

TypeError: Cannot read property 'trim' of undefined
    at NavView.module.exports.NavView.toggleBookmark (/packages/nav-panel-plus/lib/nav-view.coffee:438:24)
    at /packages/nav-panel-plus/lib/nav-view.coffee:184:12)
    at HTMLDivElement.dispatch (/packages/build/node_modules/jquery/dist/jquery.js:4435:9)
    at HTMLDivElement.elemData.handle (/packages/build/node_modules/jquery/dist/jquery.js:4121:28)

Commands

     -1:34.5.0 snippets:next-tab-stop (input.hidden-input)
     -1:34.5.0 snippets:expand (input.hidden-input)
     -1:34.5.0 editor:indent (input.hidden-input)
     -1:26.6.0 core:backspace (input.hidden-input)
     -1:26 core:save (input.hidden-input)
  3x -0:15.3.0 intentions:highlight (input.hidden-input)

Non-Core Packages

autocomplete-love 0.4.0 
build 0.68.0 
busy 0.7.0 
busy-signal 1.4.3 
file-icons 2.1.9 
intentions 1.1.5 
language-lua 0.9.11 
linter 2.2.0 
linter-eslint 8.2.1 
linter-ui-default 1.6.3 
linter-write-good 0.9.0 
nav-panel-plus 0.3.2 
nucleus-dark-ui 0.12.3 
platformio-ide-terminal 2.5.4 
Sublime-Style-Column-Selection 1.7.4