atom.workspaceView is no longer available.
In most cases you will not need the view. See the Workspace docs for
alternatives: https://atom.io/docs/api/latest/Workspace.
If you do need the view, please use atom.views.getView(atom.workspace),
which returns an HTMLElement.
Atom.Object.defineProperty.get (C:\Users\Johnson H. Bui\AppData\Local\atom\app-0.189.0\resources\app\src\atom.js:54:11)
Object.activate (C:\Users\Johnson H. Bui\.atom\packages\tab-switcher\lib\tab-switcher.coffee:27:9)
atom.workspaceView is no longer available. In most cases you will not need the view. See the Workspace docs for alternatives: https://atom.io/docs/api/latest/Workspace. If you do need the view, please use
atom.views.getView(atom.workspace), which returns an HTMLElement.