You have the wrong website, the screenshot you sent me is not shop.abccaffe.com.
Also the WooCommerce Product Add-ons plugin is not active, it is not used.
I attach a screenshot of the side slide after adding items to the cart: https://snipboard.io/vw1YP7.jpg
Everything works, I repeat: You looked at the wrong website.
I paste below the first message I sent you:
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Hi, I still have the same problem on Woocommerce. The system tells me that some template files are obsolete and need to be updated. I attach the list of files to update:
piizalian/woocommerce/archive-product.php version 3.4.0 is obsolete. The current version is 8.6.0,
piizalian/woocommerce/myaccount/navigation.php version 2.6.0 is obsolete. The current version is 9.3.0,
piizalian/woocommerce/single-product/product-image.php version 7.9.0 is obsolete. The current version is 9.0.0, How can we update those files?
My theme version is 2.4.5 My website: https://shop.abccaffe.com/
Regards.
Fabio.
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