Hi val.bouysse,

First of all, I’m really sorry have taken long time to reply you due to the weekend.

I see you are using outdated WoodMart theme, please create a dev site and update theme and core plugins to the latest version and let me know if it helps.

Devsite – also called a Staging platform where you can test issues, enable/disable features/plugins thus such changes will affect the main site. The below article will help you to create it:

https://www.wpbeginner.com/wp-tutorials/how-to-create-staging-environment-for-a-wordpress-site/

Regards,