Adding a new tab in the storybook doesn't work and produces a console error

Steps to reproduce:

1. yarn storybook
2. On left side, select: "No tabs", "1 Tab" or "2 Tabs"
3. In the main pane, click on the "plus" icon

Expected results:

New tab is created

Actual results:

No new tab, but console error

Info

Yarn version: 0.24.6 (I know it is outdated, but this just looks like an error with the React Code)
Browser: Chrome Version 59.0.3071.115