在magento 2结帐页面：一个错误被捕获，请看日志如下：
未捕获的类型错误：验证器未定义validateEmail https://www.productcategory.com/static/version1679504321/frontend/Gd/base/en_US/Magento_Checkout/js/view/form/element/email.js:166

emailHasChanged https://www.productcategory.com/static/version1679504321/frontend/Gd/base/en_US/Magento_Checkout/js/view/form/element/email.js:90

setNested https://www.productcategory.com/static/version1679504321/frontend/Gd/base/en_US/mage/utils/objects.js:44

nested https://www.productcategory.com/static/version1679504321/frontend/Gd/base/en_US/mage/utils/objects.js:118

set https://www.productcategory.com/static/version1679504321/frontend/Gd/base/en_US/Magento_Ui/js/lib/core/element/element.js:305

updateValue https://www.productcategory.com/static/version1679504321/frontend/Gd/base/en_US/Magento_Ui/js/lib/core/element/links.js:80

notifySubscribers https://www.productcategory.com/static/version1679504321/frontend/Gd/base/en_US/knockoutjs/knockout.js:1320

刷新 checkout 页面可以解决此问题，导致此问题的原因是什么？