loading tikzmagic in latest jupyter notebook

Using jupyter version  5.4.0 + python 3.6 kernel, I can import tikzmagic, but not launch the extension...

<img width="1214" alt="image" src="https://user-images.githubusercontent.com/381808/38090174-009bca38-3362-11e8-869e-2dc52380b3fb.png">

thanks,
Laurent