File: /var/www/vhost/disk-apps/magento.bikenow.co/vendor/magento/module-theme/etc/adminhtml/di.xml
<?xml version="1.0"?>
<!--
/**
* Copyright © Magento, Inc. All rights reserved.
* See COPYING.txt for license details.
*/
-->
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
<type name="Magento\Theme\Block\Adminhtml\Wysiwyg\Files\Content">
<arguments>
<argument name="storageHelper" xsi:type="object">Magento\Theme\Helper\Storage\Proxy</argument>
</arguments>
</type>
<type name="Magento\Theme\Block\Adminhtml\Wysiwyg\Files\Tree">
<arguments>
<argument name="storageHelper" xsi:type="object">Magento\Theme\Helper\Storage\Proxy</argument>
</arguments>
</type>
<type name="Magento\Theme\Block\Adminhtml\Wysiwyg\Files\Content\Uploader">
<arguments>
<argument name="storageHelper" xsi:type="object">Magento\Theme\Helper\Storage\Proxy</argument>
</arguments>
</type>
<type name="Magento\Backend\App\AbstractAction">
<plugin name="themeRegistrationFromFilesystem" type="Magento\Theme\Model\Theme\Plugin\Registration"/>
</type>
<type name="Magento\Framework\View\Element\Message\MessageConfigurationsPool">
<arguments>
<argument name="configurationsMap" xsi:type="array">
<item name="default_message_identifier" xsi:type="array">
<item name="renderer" xsi:type="const">\Magento\Framework\View\Element\Message\Renderer\EscapeRenderer::CODE</item>
</item>
</argument>
</arguments>
</type>
<type name="Magento\Theme\Model\Design\Config\Validator">
<arguments>
<argument name="fields" xsi:type="array">
<item name="header" xsi:type="string">email_header_template</item>
<item name="footer" xsi:type="string">email_footer_template</item>
</argument>
</arguments>
</type>
</config>