PrestaShop error Invalid email/password combination – not able to register

If you are also facing this problem while registering the user then you are at right place. Because in this article this problem is going to be solve This problem can be fixed by commenting condition check in file location.

Prestahopfolder/classes/form/CustomerPersister.php

You have to go to the above file and find this code and comment it.

if (!$customer->is_guest && $passwordRequired && !$this->crypto->checkHash(
            $clearTextPassword,
            $customer->passwd,
            _COOKIE_KEY_
        )) {
            $msg = $this->translator->trans(
                'Invalid email/password combination',
                [],
                'Shop.Notifications.Error'
            );
            $this->errors['email'][] = $msg;
            $this->errors['password'][] = $msg;

            return false;
        }

Full Code

<?php
/**
 * Copyright since 2007 PrestaShop SA and Contributors
 * PrestaShop is an International Registered Trademark & Property of PrestaShop SA
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the Open Software License (OSL 3.0)
 * that is bundled with this package in the file LICENSE.md.
 * It is also available through the world-wide-web at this URL:
 * https://opensource.org/licenses/OSL-3.0
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@prestashop.com so we can send you a copy immediately.
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade PrestaShop to newer
 * versions in the future. If you wish to customize PrestaShop for your
 * needs please refer to https://devdocs.prestashop.com/ for more information.
 *
 * @author    PrestaShop SA and Contributors <contact@prestashop.com>
 * @copyright Since 2007 PrestaShop SA and Contributors
 * @license   https://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
 */
use PrestaShop\PrestaShop\Core\Crypto\Hashing as Crypto;
use Symfony\Component\Translation\TranslatorInterface;

class CustomerPersisterCore
{
    private $errors = [];
    private $context;
    private $crypto;
    private $translator;
    private $guest_allowed;

    public function __construct(
        Context $context,
        Crypto $crypto,
        TranslatorInterface $translator,
        $guest_allowed
    ) {
        $this->context = $context;
        $this->crypto = $crypto;
        $this->translator = $translator;
        $this->guest_allowed = $guest_allowed;
    }

    public function getErrors()
    {
        return $this->errors;
    }

    public function save(Customer $customer, $clearTextPassword, $newPassword = '', $passwordRequired = true)
    {
        if ($customer->id) {
            return $this->update($customer, $clearTextPassword, $newPassword, $passwordRequired);
        }

        return $this->create($customer, $clearTextPassword);
    }

    private function update(Customer $customer, $clearTextPassword, $newPassword, $passwordRequired = true)
    {
        // if (!$customer->is_guest && $passwordRequired && !$this->crypto->checkHash(
        //     $clearTextPassword,
        //     $customer->passwd,
        //     _COOKIE_KEY_
        // )) {
        //     $msg = $this->translator->trans(
        //         'Invalid email/password combination',
        //         [],
        //         'Shop.Notifications.Error'
        //     );
        //     $this->errors['email'][] = $msg;
        //     $this->errors['password'][] = $msg;

        //     return false;
        // }

        if (!$customer->is_guest) {
            $customer->passwd = $this->crypto->hash(
                $newPassword ? $newPassword : $clearTextPassword,
                _COOKIE_KEY_
            );
        }

        if ($customer->is_guest || !$passwordRequired) {
            // TODO SECURITY: Audit requested
            if ($customer->id != $this->context->customer->id) {
                // Since we're updating a customer without
                // checking the password, we need to check that
                // the customer being updated is the one from the
                // current session.

                // The error message is not great,
                // but it should only be displayed to hackers
                // so it should not be an issue :)

                $this->errors['email'][] = $this->translator->trans(
                    'There seems to be an issue with your account, please contact support',
                    [],
                    'Shop.Notifications.Error'
                );

                return false;
            }
        }

        $guest_to_customer = false;

        if ($clearTextPassword && $customer->is_guest) {
            $guest_to_customer = true;
            $customer->is_guest = false;
            $customer->passwd = $this->crypto->hash(
                $clearTextPassword,
                _COOKIE_KEY_
            );
        }

        if ($customer->is_guest || $guest_to_customer) {
            // guest cannot update their email to that of an existing real customer
            if (Customer::customerExists($customer->email, false, true)) {
                $this->errors['email'][] = $this->translator->trans(
                    'An account was already registered with this email address',
                    [],
                    'Shop.Notifications.Error'
                );

                return false;
            }
        }

        if ($customer->email != $this->context->customer->email) {
            $customer->removeResetPasswordToken();
        }

        $ok = $customer->save();

        if ($ok) {
            $this->context->updateCustomer($customer);
            $this->context->cart->update();
            Hook::exec('actionCustomerAccountUpdate', [
                'customer' => $customer,
            ]);
            if ($guest_to_customer) {
                $this->sendConfirmationMail($customer);
            }
        }

        return $ok;
    }

    private function create(Customer $customer, $clearTextPassword)
    {
        if (!$clearTextPassword) {
            if (!$this->guest_allowed) {
                $this->errors['password'][] = $this->translator->trans(
                    'Password is required',
                    [],
                    'Shop.Notifications.Error'
                );

                return false;
            }

            /**
             * Warning: this is only safe provided
             * that guests cannot log in even with the generated
             * password. That's the case at least at the time of writing.
             */
            $clearTextPassword = $this->crypto->hash(
                microtime(),
                _COOKIE_KEY_
            );

            $customer->is_guest = true;
        }

        $customer->passwd = $this->crypto->hash(
            $clearTextPassword,
            _COOKIE_KEY_
        );

        if (Customer::customerExists($customer->email, false, true)) {
            $this->errors['email'][] = $this->translator->trans(
                'An account was already registered with this email address',
                [],
                'Shop.Notifications.Error'
            );

            return false;
        }

        $ok = $customer->save();

        if ($ok) {
            $this->context->updateCustomer($customer);
            $this->context->cart->update();
            $this->sendConfirmationMail($customer);
            Hook::exec('actionCustomerAccountAdd', [
                'newCustomer' => $customer,
            ]);
        }

        return $ok;
    }

    private function sendConfirmationMail(Customer $customer)
    {
        if ($customer->is_guest || !Configuration::get('PS_CUSTOMER_CREATION_EMAIL')) {
            return true;
        }

        return Mail::Send(
            $this->context->language->id,
            'account',
            $this->translator->trans(
                'Welcome!',
                [],
                'Emails.Subject'
            ),
            [
                '{firstname}' => $customer->firstname,
                '{lastname}' => $customer->lastname,
                '{email}' => $customer->email,
            ],
            $customer->email,
            $customer->firstname . ' ' . $customer->lastname
        );
    }
}