Themes in production (Vaadin 14+)

Hello dear community,
I’m using Vaadin 14.8.1,
I’ve problems when I use a theme (@Theme(themeFolder = “theme_name”)) in production mode ; in dev, it works.
it’s like the app can’t find the content of the “theme_name” folder, i tried several paths, but the problem still persists
Do you have any ideas, leads… Your help is more than appreciated
Thank you

frontend/themes/theme_name is the correct location. frontend is next to your src folder

OK. Thanks for your help