Criar arquivo no diretório /includes/hooks/

unlockip_form.php

<?php
if ($unblockip_isactive){
use WHMCS\View\Menu\Item;

add_hook('ClientAreaHomepagePanels', 1, function (Item $homePagePanels)
{
    $form_unlockip = <<<EOT
<p><strong>
    {$unblockip_alerts}</p>
    <p><form name='ipaddresscheck' method='POST' action='index.php?m=unblockip'>
    <input type="text" size="25" name="ip_address" style="text-align: center;" value="{$smarty.server.REMOTE_ADDR}" class="form-control">
    <input type="hidden" name="action" value="remove_ip_block" /><br/>
    <input class="btn btn-primary" type="submit" name="unblock" value="{$unblock_lang.request_removal_of_block}" />
    </form>   
EOT;

    $homePagePanels->addChild('unlockip_form', array(
        'label' => 'Desbloquear IP',
        'icon' => 'fa-unlock',
        'order' => 20,
        'bodyHtml' => $form_unlockip,
    ));
});
}