Sales Order Grid Mass Action Route 404 Error

I have created module to send email using mass actions, but it is showing 404 error.

view/adminhtml/ui_components/sales_order_grid.xml

<listing xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Ui:etc/ui_configuration.xsd">
    <listingToolbar name="listing_top">
        <massaction name="listing_massaction">
            <action name="mass_email_rx">
                <settings>
                    <confirm>
                        <message translate="true">Are you sure to send Rx Missing Email to the selected customers?</message>
                        <title translate="true">Send Rx Missing Email</title>
                    </confirm>
                    <url path="massemailcustomers/email/rxSend"/>
                    <type>mass_email_rx</type>
                    <label translate="true">Send Rx Missing Email</label>
                </settings>
            </action>
            
        </massaction>
    </listingToolbar>
</listing>

etc/adminhtml/routes.xml

<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:App/etc/routes.xsd">
    <router id="admin">
        <route id="massemailcustomers" frontName="massemailcustomers">
            <module name="Vendor_MassEmailCustomers" before="Magento_Backend" />
        </route>
    </router>
</config>

Conroller/Adminhtml/Email/RxSend.php

<?php

declare(strict_types=1);

namespace VendorMassEmailCustomersControllerAdminhtmlEmail;

use MagentoFrameworkControllerResultFactory;
use MagentoBackendAppActionContext;
use MagentoFrameworkMailTemplateTransportBuilder;
use MagentoFrameworkTranslateInlineStateInterface;
use MagentoUiComponentMassActionFilter;
use MagentoBackendAppAction;
use MagentoFrameworkExceptionLocalizedException;
use MagentoCustomerModelResourceModelCustomerCollectionFactory as CustomerCollectionFactory;
use MagentoSalesModelResourceModelOrderCollectionFactory as SalesCollectionFactory;
use VendorMassEmailCustomersModelConfig;
use MagentoFrameworkAppArea;
use MagentoSalesModelOrder;
use MagentoFrameworkExceptionMailException;
use MagentoBackendModelViewResultRedirect;

class RxSend extends Action
{
    /**
     * @var Filter
     */
    protected $filter;

    /**
     * @var salesCollectionFactory
     */
    protected $salesCollectionFactory;

    /**
     * @var CustomerCollectionFactory
     */
    protected $customerCollectionFactory;

    /**
     * @var Config
     */
    protected $config;

    /**
     * @var TransportBuilder
     */
    protected $transportBuilder;

    /**
     * @var StateInterface
     */
    protected $inlineTranslation;

    /**
     * @param Context $context
     * @param Filter $filter
     * @param Config $config
     * @param CustomerCollectionFactory $customerCollectionFactory
     * @param SalesCollectionFactory $salesCollectionFactory
     * @param TransportBuilder $transportBuilder
     * @param StateInterface $inlineTranslation
     */
    public function __construct(
        Context $context,
        Filter $filter,
        Config $config,
        CustomerCollectionFactory $customerCollectionFactory,
        SalesCollectionFactory $salesCollectionFactory,
        TransportBuilder $transportBuilder,
        StateInterface $inlineTranslation
    ) {
        $this->filter = $filter;
        $this->config = $config;
        $this->customerCollectionFactory = $customerCollectionFactory;
        $this->salesCollectionFactory = $salesCollectionFactory;
        $this->transportBuilder = $transportBuilder;
        $this->inlineTranslation = $inlineTranslation;
        parent::__construct($context);
    }

    /**
     * Execute action
     *
     * @return Redirect
     * @throws LocalizedException
     */
    public function execute()
    {
        var_dump("rx email to send");
    }
}