Uncaught TypeError: undefined is not a function

[edoardoo]

[Enter steps to reproduce:]

1. Open a markdown file
2. Toggle Markdown Preview
3. Watch as errors pop up without stopping

Atom: 1.22.0 x64
Electron: 1.6.15
OS: Mac OS X 10.12.6
Thrown From: xatom-debug package 1.6.11

Stack Trace

Uncaught TypeError: undefined is not a function

At /Users/massimotorelli/.atom/packages/xatom-debug/lib/editor/editor-manager.js:223

TypeError: undefined is not a function
    at EditorManager.getEditorPositionFromEvent (/packages/xatom-debug/lib/editor/editor-manager.js:223:62)
    at EditorManager.listenExpressionEvaluations (/packages/xatom-debug/lib/editor/editor-manager.js:252:35)
    at HTMLDivElement.expressionHandler (/packages/xatom-debug/lib/editor/editor-manager.js:159:57)

Commands

     -1:52.8.0 core:copy (atom-notification.fatal.icon.icon-bug.native-key-bindings.has-detail.has-close.has-stack)

Non-Core Packages

atom-ide-ui 0.5.0 
atom-typescript 11.0.10 
blame 0.12.0 
busy-signal 1.4.3 
ide-typescript 0.1.6 
intentions 1.1.5 
js-refactor 0.7.5 
linter 2.2.0 
linter-ui-default 1.6.10 
material-ui 1.0.10 
refactor 0.11.5 
xatom-debug 1.6.11 
xatom-debug-chrome 0.7.4 
xatom-debug-nodejs 0.9.3