Issue with variable products

I’ve recently set up an online shop using your plugin, but I’m facing an issue with variable products. When a customer selects an option from the dropdown menu (e.g., size or color), the price doesn’t update accordingly. I’ve ensured that all variations have prices assigned and are published. The issue persists even after disabling all other plugins and switching to a default theme. Is there a specific setting I might have overlooked, or could this be a bug with how the plugin handles variations?