Accordion is not working

Hi, when I try this plugin, I first add a “row” block and then add the “accordion” block. But the “add accordion title” is not editable. The “add content” is editable, but no matter what I input, the page shows nothing.

I deactivated all other plugins and tried with default 2019 theme, Astra and Generatepress, neither works.

All themes and plugins are up to date. I use Google Chrome.

Any idea? Thanks.

Jack