view/frontend/layout/sales_email_order_shipment_renderers.xml
<page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd" label="Email Creditmemo Items List" design_abstraction="custom">
<body>
<referenceBlock name="sales.email.order.shipment.renderers.default">
<action method="setTemplate" >
<argument name="template" xsi:type="string">Vendor_Sales::email/items/shipment/default.phtml</argument>
</action>
</referenceBlock>
<referenceBlock name="sales.email.order.shipment.renderers.grouped">
<action method="setTemplate" >
<argument name="template" xsi:type="string">Vendor_Sales::email/items/shipment/default.phtml</argument>
</action>
</referenceBlock>
<referenceBlock name="sales.email.order.shipment.renderers.bundle">
<action method="setTemplate" >
<argument name="template" xsi:type="string">Vendor_Sales::email/items/shipment/default.phtml</argument>
</action>
</referenceBlock>
<referenceBlock name="sales.email.order.shipment.renderers.downloadable">
<action method="setTemplate" >
<argument name="template" xsi:type="string">Vendor_Sales::email/items/shipment/default.phtml</argument>
</action>
</referenceBlock>
</body>
</page>
file frontend/templates/email/items/shipment/default.phtml
<?php
/** @var $_item \Magento\Sales\Model\Order\Item */
$_item = $block->getItem();
$_order = $_item->getOrder();
$helper = $this->helper('Mod\Sales\Helper\Data');
$product_image = $helper->getProductImage($_item->getSku());
$productObj = $helper->getProductBySku($_item->getSku());
$color = $productObj->getAttributeText('color');
$size = $productObj->getAttributeText('size');
$brand = $productObj->getDisplayBrand();
?>
<tr>
<!-- Price -->
<div align="left" style="font-size:16px;">
<?php echo $block->getItemPrice($_item) ?>
</div>
<!-- Spacer -->
</td>
</tr>
<tr>
<td height="25">
</td>
</tr>
Error: Call to a member function setItem() on bool in vendor/magento/module-sales/Block/Order/Email/Items/DefaultItems.php:118 Stack trace: #0
Any thoughts why it shows such error & how to fix it asap ?