app/design/frontend/Vendor/Customtheme/Magento_Theme/layout/default.xml
<?xml version="1.0"?> <!-- /** * Copyright © 2016 Magento. All rights reserved. * See COPYING.txt for license details. */ --> <page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd"> <body> <referenceBlock name="register-link" remove="true" /> <referenceBlock name="authorization-link" remove="true" /> <referenceBlock name="wish-list-link" remove="true" /> <referenceBlock name="my-account-link" remove="true" /> <referenceBlock name="top.links" remove="true" /> <referenceBlock name="header.panel.wrapper" remove="true" /> <referenceBlock name="header.container" remove="true" /> <referenceContainer name="page.wrapper"> <container name="custom.header" htmlClass="headerSection" htmlTag="div" before="main.content"> <block class="Magento\Framework\View\Element\Template" name="navigation.sections" before="-" template="Magento_Theme::html/customheader.phtml"> </block> </container> </referenceContainer> </body> </page> app/design/frontend/Vendor/Customtheme/Magento_Theme/templates/html/customheader.phtml
<h1>Custom Header Content here</h1> It's giving me this error
Exception #0 (Magento\Framework\Exception\ValidatorException): Invalid template file: 'Magento_Theme::html/customheader.phtml' in module: '' block's name: 'navigation.sections'
