installation_forbidden.php « templates « core - github.com/nextcloud/server.git - Unnamed repository; edit this file 'description' to name the repository.
<div class="guest-box">
<h2><?php p($l->t('Error')) ?></h2>
<p class="text-left">
<?php p($l->t('It looks like you are trying to reinstall your Nextcloud. However the file CAN_INSTALL is missing from your config directory. Please create the file CAN_INSTALL in your config folder to continue.')) ?>
</p>
</div>