Issue Overview

If I hover over the editor I get the error:

Steps to Reproduce (for bugs)

1. Install Gutenberg 2.3.0
2. Go to Demo-page
3. Hover over text in editor

My system:

• WordPress 4.9.4 (german)
• MacBook Pro/macOS 10.13.3
• Safari Version 11.0.3
• Chrome Version 64.0.3282.186

Expected Behavior

Current Behavior

Possible Solution

Screenshots / Video

Related Issues and/or PRs

Todos

• Tests
• Documentation