Thanks for the advice - can you give me more detailed instruction. I'm not very advanced for Magento!
I tried to remove the file, which worked better as it went back to the site, but said "An unspecified error occurred. Please contact us for assistance.".
My CustomerLogin.php file is as follows:
<?php
/**
* Copyright © Magento, Inc. All rights reserved.
* See COPYING.txt for license details.
*/
namespace Magento\Wishlist\Observer;
use Magento\Framework\Event\Observer;
use Magento\Framework\Event\ObserverInterface;
use Magento\Wishlist\Helper\Data;
/**
* Class CustomerLogin
* @package Magento\Wishlist\Observer
*/
class CustomerLogin implements ObserverInterface
{
/**
* @var \Magento\Wishlist\Helper\Data
*/
protected $wishlistData;
/**
* @param Data $wishlistData
*/
public function __construct(Data $wishlistData)
{
$this->wishlistData = $wishlistData;
}
/**
* @param Observer $observer
* @return void
*/
public function execute(Observer $observer)
{
$this->wishlistData->calculate();
}
}
