How to display the result of a Javascript cell?

@spookster I’m getting this error when restarting the server:

image

running the Python 3 (ipykernel) kernel works fine… any idea?

finding this post: Kernel Error: Failed to start a kernel - #3 by Rose_Zhang
it looks like it works when I start the server from the command line but not from the launcher… (on linux mint with jupyter notebook 7.0)