注册页面的firstname 与 lastName都是必填项。

有2种方法

1，把firstname 与 lastName改成非必填并隐藏起来

UPDATE `eav_attribute` SET `is_required` = ‘0’ WHERE `eav_attribute`.`attribute_id` = 5;
UPDATE `eav_attribute` SET `is_required` = ‘0’ WHERE `eav_attribute`.`attribute_id` = 7;

https://medium.com/medvine/magento-2-dont-require-first-name-last-name-on-registration-4ec5d4d21059

2，给firstname 与 lastName默认值并隐藏起来

<?php
namespace StackExchange\Magento\Plugin;

use Magento\Customer\Api\Data\CustomerInterface;

class AccountManagementPlugin 
{
    public function beforeCreateAccount(
        \Magento\Customer\Api\AccountManagementInterface $subject,
        CustomerInterface $customer,
        $password = null,
        $redirectUrl = ''
    ){
        // Set dump value to - to firstName and last Name
        if($customer->getFirstname() == null){
            $customer->setFirstname('-');
        }
        if($customer->getLastname() == null){
            $customer->setLastname('-');
        }       
        return [$customer,$password,$redirectUrl];
    }
}

https://magento-qa.com/how-to-create-customer-without-firstname-and-lastname-in-magento-2-api