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Checkout Button not working

If the checkout button is not working in the cart or the mini-cart, the reason is probably that the authentication-popup block was removed from the header-content.

How does the checkout button work?

Clicking the checkout buttons dispatches an event toggle-authentication, which is processed by the authentication-popup block template.

The Magento_Customer/templates/account/authentication-popup.phtml template triggers a login form before redirecting to the cart if guest checkout is disabled.

The authentication-popup block is declared in Magento_Customer/layout/default.xml

<block class="Magento\Customer\Block\Account\Customer" name="authentication-popup"

The authentication-popup template is rendered by the parent template Magento_Theme/templates/html/header.phtml.

How do I find out if I'm missing the authentication-popup?

To check if the authentication-popup block is missing, compare the Magento_Theme/templates/html/header.phtml template in your theme to the original at


The template in your theme is probably missing the line

<?= $block->getChildHtml('authentication-popup'); ?>