<div class="tnp-modal2" id="attachment-modal" aria-hidden="true">
    <div class="tnp-modal2__content" role="dialog" style="width: 600px">
        <header class="tnp-modal2__header">

            <h2><?php _e("Attachments", 'newsletter') ?></h2>
            <span class="tnp-modal2__close" data-tnp-modal-close aria-label="Close modal"></span>
        </header>

        <div class="tnp-modal2__body">

            <p>
                The Newsletter plugin does not support attachments. 
                <a href="https://www.thenewsletterplugin.com/documentation/adding-attachments-to-newsletters/" target="_blank">Please read more in our documentation</a>.
            </p>

        </div>

    </div>
</div>