Not working with WP 5.0

Hi,

I’m not able to resolve the incompatibility with WP 5.0. I’ve tried following the instructions in the plugin’s Installation section, but I’m not seeing the “Add checklist” button. Where should it be?

I created a brand new page to test the method, using the new block editor. For the rest of the site, I’m using the Elementor page constructor plugin. The page link I provide is made with Elementor.

Is the new block editor what you call the “Classic block”?

Merry Christmas.

The page I need help with: [log in to see the link]