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I'm not sure you can do that. form_additional_info is a container and they don't have data. As per the docs: https://devdocs.magento.com/guides/v2.4/frontend-dev-guide/layouts/xml-instructions.html#fedg_layout_xml-instruc_ex_cont A structure without content that holds other layout elements such as blocks and containers. Your error message is telling you ...


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