Multiple price not saved or show at product setup

Hello there, we only just start using Dolibarr V14.0.1, during the setup process, we can’t seem to get the multi-price saved correctly. What we did was, in the product module we enabled Variants and use “Multiple price segments per product/service” as a rule for selling price. however, at the product - selling price setup, every time we update each level of prices and then click “save”, none of any prices were saved, even the notification pop up “record saved” all the prices remains 0 (default). Does anyone know what the issue could be? Thanks