Uncaught TypeError: Cannot read property 'lastIndexOf' of undefined

[PratyushPareek]

[Enter steps to reproduce:]

1. ...
2. ...

Atom: 1.53.0 x64
Electron: 6.1.12
OS: Microsoft Windows 10 Home Single Language
Thrown From: AFCP package 0.8.20

Stack Trace

Uncaught TypeError: Cannot read property 'lastIndexOf' of undefined

At C:\Users\praty\.atom\packages\AFCP\lib\cp-automation.js:248

TypeError: Cannot read property 'lastIndexOf' of undefined
    at Object.compile (/packages/AFCP/lib/cp-automation.js:248:35)
    at HTMLElement.cpAutomationCompile (/packages/AFCP/lib/cp-automation.js:121:43)
    at CommandRegistry.handleCommandEvent (~/AppData/Local/atom/app-1.53.0/resources/app/static/<embedded>:11:350265)
    at KeymapManager.dispatchCommandEvent (~/AppData/Local/atom/app-1.53.0/resources/app/static/<embedded>:11:1230852)
    at KeymapManager.handleKeyboardEvent (~/AppData/Local/atom/app-1.53.0/resources/app/static/<embedded>:11:1226986)
    at WindowEventHandler.handleDocumentKeyEvent (~/AppData/Local/atom/app-1.53.0/resources/app/static/<embedded>:11:284919)

Commands

     -2:02.5.0 core:move-up (input.hidden-input)
     -2:02.2.0 core:move-right (input.hidden-input)
 26x -2:01.5.0 core:move-left (input.hidden-input)
 58x -1:58.3.0 core:select-right (input.hidden-input)
     -1:55 core:select-left (input.hidden-input)
 12x -1:54.4.0 core:move-left (input.hidden-input)
     -1:53.8.0 core:move-down (input.hidden-input)
 24x -1:53.6.0 core:move-left (input.hidden-input)
     -1:51 core:move-down (input.hidden-input)
  2x -1:50.6.0 core:move-left (input.hidden-input)
     -1:47.5.0 cp-automation:compile (input.hidden-input)
     -1:30.1.0 grammar-selector:show (atom-text-editor.editor.is-focused)
     -0:59.5.0 cp-automation:compile (input.hidden-input)
     -0:42.2.0 core:move-down (input.hidden-input)
  2x -0:42 core:move-left (input.hidden-input)
     -0:39.3.0 cp-automation:compile (input.hidden-input)

Non-Core Packages

AFCP 0.8.20 
atom-material-ui 2.1.3 
gpp-compiler 3.0.7 
script 3.26.0 
slack-ui 0.8.0