Marc Schmitt

Switch needs an integer value(0,1,...). But you're using chs() that will reference a string value.

Try to remove the "s". Does ch() work?

Sneak peek: https://youtu.be/lFG1FIXBprc?is=gX4Qzz2-HZMKD_86 [youtu.be]

In your screenshot we can't see the parameters and what's going on in the geo spreadsheet.
If you upload a file, we can have a look.

Maybe attrib wrangle is set to detail (instead to vertices, I suppose)?