Switcher not showing/working

Hello!

It’s probably my fault… but the switcher is not showing up or working on my page.

Could you please have a look at: http://holz-rauch.de/converter/

Thank you for this wonderful plugin and your help,

Maria

https://wordpress.org/plugins/units/