The errors you shared helped us to find the root cause. Some WooCommerce placeholder strings weren't translated correctly. %s items was translated as % articles (the "s" was missing).
I did the corrections in "WPML > String Translation" and now I'm able to see variations from your account and the Shop manager account.
Sorry if I wasn't clear enough:
- Go to "WPML > String Translation"
- Search for "%s items"
- Check all FR translations (some are correct some are not). The placeholder is %s so in French the translation should be %s articles (if the "s" is missing it will generate an error - see screenshot from previous answer).