现有功能未定义JavaScript函数错误

Question

我有一个功能，可以在表单提交时调用它来发送ajax请求。问题是，当我尝试提交表单时，出现以下错误：“ checkCustomerExists未定义”另外奇怪的是，我有一个暂存和生产站点，它们当前是相同的，并且暂存站点无法正常工作问题，但生产站点就是有问题的站点。这是到目前为止我在两个站点上都拥有的内容：

 <script>

        function checkCustomerExists(){
            var phone = $('input[name=phone]').val();
            var email = $('input[name=email]').val();
            loadingModal();
            if (phone !== '' && email !== '' && !checkedIfAccount){
                var data = {
                    email,
                    phone
                };
                checkedIfAccount = true;
                $.ajax({
                    url: "{{ shop.metafields.API.doesCustExist }}",
                    data: JSON.stringify(data),
                    method: "POST",
                    dataType: "json",
                    success: function(json){
                        if (json.exists){
                            if(!json.active){
                                var contactName;
                                var contactType;
                                if (json.email){
                                    contactName = json.email;
                                    contactType = 'email';
                                } else if(json.phone) {
                                    contactName = json.phone;
                                    contactType = 'phone number';
                                }
                                $('#error-message').html('Your account with the '+contactType+' <span>'+contactName+'</span> has not yet been activated. An email has been sent to you with an activation link to finish creating your account.');
                                $('#account-exists-modal').modal('show');

                            }
                            else if (json.email){
                                $('#error-message').html('There is an existing account with the registered email <span style="color: red">'+json.email+'</span>. Please Log In with the provided form.');
                                $('#account-exists-modal').modal('show');
                            } else if (json.phone){
                                $('#error-message').html('There is an existing account with the phone number <span style="color: red">'+json.phone.replace(/^\(?([0-9]{3})\)?(\s)?[-.●]?([0-9]{3})(\s)?[-.●]?([0-9]{4})$/, '($1) $3-$5')+'</span>. Please Log In with the provided form.');
                                $('#account-exists-modal').modal('show');
                            }
                            doesAcctExist = true;
                    } else {
                        addCustomeToPro();

                    }
                });
                checkedIfAccount = true;
            }
        }
    </script>
<script>
    var checkedIfAccount = false;
    var doesAcctExist = false;

    $('#add_prof').submit(function(e){
        e.preventDefault();
        var professions = [];
            $('.prof_check:checkbox:checked').each(function(){
                professions.push('Profession:' + $(this).val());
            });

            if (!validateForm(professions)) {
                unloadButton();
                return false;
            }
        checkCustomerExists();

    });
</script>

我不知道为什么一个有效而另一个无效。它们也都在Shopify商店中。任何帮助表示赞赏。