[Plugin: Catalog Mode] Custom button or read more link doesn't show !!

Hello,

I’m using the catalog mode.
The add to cart button is well removed, but when i choose a “custom button” or the “read more link”, nothing is shown.

I’m using Storefront, and the “functions.php” file from my childtheme is almost blank.
So i think i didn’t mess anything.

Thank you in advance for your help.