Some of product detail page error- Element 'reference': This element is not expected

Question

When I tried to change or open product I got next message:

1 exception(s):
Exception #0 (Magento\Framework\Config\Dom\ValidationException): Element 'reference': This element is not expected.
Line: 1


Exception #0 (Magento\Framework\Config\Dom\ValidationException): Element 'reference': This element is not expected.
Line: 1

Some of products have this error and I don't know where in XML I was wrong?

<?xml version="1.0"?>

    <move element="page.main.title" destination="product.info.main" before="-"/>

    <move element="product.info.review" destination="product.info.main" before="product.info.price"/>
    <referenceBlock name="product.info.sku" remove="true" />
    <referenceBlock name="product.info.overview">
        <arguments>
            <argument name="at_label" translate="true" xsi:type="string">none</argument>
        </arguments>
    </referenceBlock>
    <referenceContainer name="product.info.media">
    </referenceContainer>


    <move element="product.info.stock.sku" destination="product.info.main" after="page.main.title"/>
    <container name="cart.wrapper" htmlTag="div" htmlClass="d-flex flex-column bg-smoke pl-5 py-4"/>
    <move element="cart.wrapper" destination="product.info.main" after="product.info.description"/>
    <move element="product.price.final" destination="cart.wrapper" before="product.info"/>
    <move element="product.info" destination="cart.wrapper" after="-"/>



    <block class="Magento\Framework\View\Element\Template" name="product.info.anchor" template="Hiddentechies_Bizkick::product/anchors.phtml"/>

    <move element="product.info.anchor" destination="content" after="product.info.media"/>



    <move element="content.aside" destination="content" after="product.info.anchor"/>

    <move element="product.info.details" destination="content" after="content.aside"/>

--> -->

    <move element="product.price.tier" destination="cart.wrapper" after="product.info" />


    <referenceContainer name="alert.urls" remove="true"/>
    <referenceContainer name="product.info.extrahint" remove="true"/>
    <referenceContainer name="product.info.review" remove="true"/>
</body>

Answer 1

Looks like this error related to your XML layout files, you have element , this will show the error, You you need to search ' element in admin in XML Layout update field in Category, CMS Page and etc.

As you are getting this is product detail page so you should look in product detail xml or it's admin section of layout updates.

Or there may be third party extension which have layout update related xml.