Uncaught TypeError: atom.workspace.getActivePaneItem(...).setText is not a function

[ItzVeer]

[Enter steps to reproduce:]

1. ...
2. ...

Atom: 1.37.0 x64 Electron: 2.0.18 OS: Microsoft Windows 8.1 Pro Thrown From: atom-css-comb package 3.5.1

Stack Trace

Uncaught TypeError: atom.workspace.getActivePaneItem(...).setText is not a function

At C:\Users\HP\.atom\packages\atom-css-comb\lib\css-comb.js:139

TypeError: atom.workspace.getActivePaneItem(...).setText is not a function
    at /packages/atom-css-comb/lib/css-comb.js:139:60
    at ~/AppData/Local/atom/app-1.37.0/resources/app/static/<embedded>:14:38272
    at Function.simpleDispatch (~/AppData/Local/atom/app-1.37.0/resources/app/static/<embedded>:11:1174290)
    at Emitter.emit (~/AppData/Local/atom/app-1.37.0/resources/app/static/<embedded>:11:1175731)
    at ChildProcess.<anonymous> (~/AppData/Local/atom/app-1.37.0/resources/app/static/<embedded>:14:37385)
    at emitTwo (events.js:126:13)
    at ChildProcess.emit (events.js:214:7)
    at emit (internal/child_process.js:772:12)
    at _combinedTickCallback (internal/process/next_tick.js:141:11)
    at process._tickCallback (internal/process/next_tick.js:180:9)

Commands

     -8:58.4.0 command-palette:toggle (div.tool-panel.tree-view)
     -8:48.9.0 settings-view:install-packages-and-themes (div.tool-panel.tree-view)
  2x -8:36.7.0 core:paste (input.hidden-input)
     -7:45.2.0 core:backspace (input.hidden-input)
     -7:35.9.0 core:paste (input.hidden-input)
     -6:20.3.0 encoding-selector:show (div.line)
     -6:06.0 tree-view:reveal-active-file (div.line)
     -5:27.9.0 command-palette:toggle (input.hidden-input)
     -5:08.2.0 settings-view:view-installed-packages (input.hidden-input)
     -4:38.9.0 core:save (input.hidden-input)
     -0:58.8.0 css-comb:comb (input.hidden-input)
     -0:55.7.0 core:select-all (input.hidden-input)
     -0:54.1.0 css-comb:comb (input.hidden-input)
     -0:50.8.0 core:save (input.hidden-input)

Non-Core Packages

atom-beautify 0.33.4 
atom-css-comb 3.5.1