Problem: You are trying to set products to 'not translatable' in WPML settings, but when you click save, it loads without saving the changes. Solution: We resolved this issue by deleting the slug translation through WPML-> String Translation. We recommend you check if the product URLs now work as you need.
Please note that this solution might be outdated or not applicable to your specific case. We highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have installed the latest versions of themes and plugins. If the problem persists, please open a new support ticket.