nextcloud-server/apps/files_sharing/templates/part.404.php

<ul>
	<li class="error error-broken-link">
		<p><?php p($l->t('Sorry, this link does not seem to work anymore.')) ?></p>
		<p><?php p($l->t('Reasons might be:')); ?></p>
		<ul>
			<li><?php p($l->t('the item was removed')); ?></li>
			<li><?php p($l->t('the link expired')); ?></li>
			<li><?php p($l->t('sharing is disabled')); ?></li>
		</ul>
		<p><?php p($l->t('For more info, please ask the person who sent this link.')); ?></p>
	</li>
</ul>