Uncaught TypeError: Cannot read property 'file' of undefined

[vmvwebworks]

[Enter steps to reproduce:]

1. ...
2. ...

Atom: 1.35.1 x64
Electron: 2.0.18
OS: Ubuntu 18.10
Thrown From: html2slim package 0.5.0

Stack Trace

Uncaught TypeError: Cannot read property 'file' of undefined

At /home/marcos/.atom/packages/html2slim/lib/html2slim.coffee:51

TypeError: Cannot read property 'file' of undefined
    at Object.convert (/packages/html2slim/lib/html2slim.coffee:51:30)
    at /packages/html2slim/lib/html2slim.coffee:17:85)
    at CommandRegistry.handleCommandEvent (/usr/share/atom/resources/app/static/<embedded>:11:350055)
    at Object.didConfirmSelection (/usr/share/atom/resources/app/static/<embedded>:11:692962)
    at SelectListView.confirmSelection (/usr/share/atom/resources/app/static/<embedded>:11:858354)
    at HTMLDivElement.core:confirm (/usr/share/atom/resources/app/static/<embedded>:11:853233)
    at CommandRegistry.handleCommandEvent (/usr/share/atom/resources/app/static/<embedded>:11:350055)
    at KeymapManager.t.exports.KeymapManager.dispatchCommandEvent (/usr/share/atom/resources/app/static/<embedded>:11:1230796)
    at KeymapManager.t.exports.KeymapManager.handleKeyboardEvent (/usr/share/atom/resources/app/static/<embedded>:11:1226930)
    at WindowEventHandler.handleDocumentKeyEvent (/usr/share/atom/resources/app/static/<embedded>:11:285234)

Commands

     -0:13.2.0 command-palette:toggle (div.tool-panel.tree-view)
  5x -0:10.9.0 core:backspace (input.hidden-input)
     -0:06.3.0 core:move-down (input.hidden-input)
     -0:04.8.0 core:confirm (input.hidden-input)
     -0:04.7.0 html2slim:convert (div.tool-panel.tree-view)

Non-Core Packages

all-hallows-eve-syntax 1.3.0 
atom-bulma 0.7.1 
atom-material-ui 2.1.3 
atom-updater-linux 1.3.0 
autumn-highlighter-syntax 3.0.2 
city-lights-syntax 1.1.8 
dark-flat-ui 1.2.4 
duotone-dark-amethyst-syntax 2.0.4 
duotone-dark-candy-syntax 2.0.0 
duotone-dark-cave-syntax 0.1.3 
duotone-dark-earth-syntax 2.1.0 
duotone-dark-red-syntax 0.3.2 
duotone-dark-sea-syntax 2.1.0 
duotone-dark-sky-syntax 2.1.0 
duotone-dark-space-syntax 2.1.0 
duotone-dark-syntax 2.1.0 
duotone-darkpool-syntax 1.1.0 
duotone-denim-syntax 0.4.3 
file-icons 2.1.31 
git-diff-details 1.4.0 
html2haml 0.10.0 
html2slim 0.5.0 
language-markdown 0.29.0 
language-slim 1.0.0 
markdown-writer 2.11.5 
material-colors 0.1.0 
minimap 4.29.9 
moonlight 0.11.0 
rails-partials 0.9.2 
rails-rspec 0.3.2 
rails-snippets 2.21.0 
ruby-slim 0.2.0 
seti-icons 1.5.4 
slim-language 2.2.0 
summer-night-syntax 2.0.1 
tree-view-git-status 1.5.2 

also installed erb2slim and & html2slim gems on the default system gemset