I'm upgrading a theme from 2.2.x to .2.3
there are so many xml in this theme have the following directive
<?xml version="1.0"?>
<page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">
<update handle="customer_account"/>
<update handle="sales_order_item_renderers"/>
<update handle="sales_order_item_price"/>
<update handle="sales_order_info_links"/>
<body>
.........
error message display when i visit on front page:
Element 'update': This element is not expected
If update element is not supported, how can i migrate these statements to supported version?