I can’t use Product Data

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good morning and thank you all for your patience, I’ll start by saying that I’m a novice with wordpress (that is, I’m getting by but I still have a way to go) I have to insert a code on product data> shipping>starting point, to insert a product customizer on the my site… but it doesn’t let me do it with the current version I have of woocommerce (latest version) how can I do it… I’m attaching a photo of what I see… you can clearly see in the photo which makes me select “MyCustomizer Product” and then asks me to use the previous version and change the interface… but it doesn’t change. as I said, I’m attaching a screen of what I see and then a screen with the previous version where you can see what I want to do… thank you very much for your patience

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image of what I want to do:

[what I see:](https://preview.redd.it/l47xn42qqzmc1.png?width=3202&format=png&auto=webp&s=73ca41f7f539933592f4bf6e6474f1b13b8a220a)

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[immagine 2](https://preview.redd.it/zv4ox1hyqzmc1.png?width=2150&format=png&auto=webp&s=12ac728901065e61d469e4c3d8cbeb1b9a6638a9)

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[if I click \\”change\\” nothing happens :\(](https://preview.redd.it/eovctaacrzmc1.png?width=1075&format=png&auto=webp&s=6c75aa7612f60e6a778a526f887e2194c9c1e29c)

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