Return url set on payment does not work / nor does Force a menu on the checkout

-- url of the page with the problem -- : secure.seleatherfest.com/index.php?optio...&view=article&id=755
-- HikaShop version -- : 4.0.3
-- Joomla version -- : 3.9.4
-- PHP version -- : 7.1.14
-- Browser(s) name and version -- : safari 10.1.2
-- Error-message(debug-mod must be tuned on) -- : na

I've tried a few places. I'm processing orders just fine and the pop that invites a link to view orders occurs. But the page is blank.

I have set the return url in the payment plugin and I have set force a menu on the checkout in configuration. Please see snap shoots of both.

I looked in the End file:
<?php
/**
* @package HikaShop for Joomla!
* @version 4.0.3
* @author hikashop.com
* @copyright (C) 2010-2019 HIKARI SOFTWARE. All rights reserved.
* @license GNU/GPLv3 www.gnu.org/licenses/gpl-3.0.html
*/
defined('_JEXEC') or die('Restricted access');
?><?php
if(empty($this->html)) {
echo JText::_('THANK_YOU_FOR_PURCHASE');
if(!empty($this->url))
echo '<br/>'.JText::sprintf('YOU_CAN_NOW_ACCESS_YOUR_ORDER_HERE', $this->url);
} else {
echo $this->html;
}
$this->nextButton = false;

The page itself renders independently but not when someone checks out. Return url is: secure.seleatherfest.com/index.php?optio...&view=article&id=755

Ideas pls?

Hi Phillip-- there was no possibility of getting this to work so I ditched Stripe altogether. I opened a new account with a different provider. There wasn't another solution I could find.