Spirix on MacOS

I’m hoping someone can help me out here.
I’ve installed the spirix.rbz through the extension manager. However when I try to use the “create surface” I don’t get the popup that should appear. I’m using a Apple Macbook Pro with Mojave on it.

Does anyone know what could be going on here?

Try opening the Ruby Console and seeing if any error messages appear when you try to use “create surface”.