Website prices don’t reflect variation prices

I have assigned prices based on attributes using the attribute markup plugin. I’ve generated the 1300 possible variations and assigned a ‘regular price’. On my end, under the product variations, the regular price is correct whereby if an option that costs more is selected, the price is increases accordingly in the ‘regular price’ box.

However, when I test the product on the website, the price doesn’t change when a more expensive option is selected.

Why, and how do I fix it?

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