pagelist_ext and meta_key

Hello
I’d like to get a list with images and text displaying pages from a specific category. As you’re not willing to do a shortcode for categories, I add to use metakeys instead.
But, while it works nice with pagelist, it doesn’t work with pagelist_ext.
When I use [pagelist meta_key=”categorie” meta_value=”lycéens”], I get my list, but when I use the same with “_ext” [pagelist_ext meta_key=”categorie” meta_value=”lycéens”] it doesn’t work. It just doesn’t show anything.
What am I doing wrong?

https://wordpress.org/plugins/page-list/