That's odd, the browser should be launched in a future so it shouldn't block. What OS are you on?

I can't reproduce locally on OSX :thinking_face:

I am running Ubuntu Linux in WSL (Windows Subsystem for Linux).

Perhaps it is a problem with my WebBrowser. I will try Chrome or Firefox. Currently I use the more exotic browser Vivaldi.

I think chromium would probably work best

OK, I give it a try

Good news: I've installed Firefox and now the REPL is not blocked anymore. (I had no luck installing chromium in WSL but Firefox is OK)

Thanks for your support

Sweet! Let me know if you run into any other issues 👌