Starting a new thread on this, per Aaron's instructions from here... https://community.developer.authorize.net/t5/Integration-and-Testing/Accept-js-error-E-WC-14-Accept-...

We have customers reporting this error approximately once daily.  The other 1,500(ish) daily transactions go through no problem.  Due to the infrequency, I haven't been able to duplicate it on my end.  Here's some code from our implementation (PHP).  Let me know if there's anything else I can provide that might be helpful.  Thanks!

* On the billing info page...

<script language="javascript">

function sendPaymentDataToAnet() {
    if (validate_checkout_form(document.getElementById('checkout_form'))) {
        var secureData = {}, authData = {}, cardData = {};
        
        cardData.cardNumber = document.getElementById('cc_num').value;
        cardData.month = document.getElementById('cc_month').value;
        cardData.year = document.getElementById('cc_year').value;
        secureData.cardData = cardData;
        
        authData.clientKey = '<?php echo MERCHANT_CLIENT_KEY; ?>';
        authData.apiLoginID = '<?php echo MERCHANT_LOGIN_ID; ?>';
        secureData.authData = authData;
        
        Accept.dispatchData(secureData, 'responseHandler');
    }
}

function responseHandler(response) {
    if (response.messages.resultCode === 'Error') {
        for (var i = 0; i < response.messages.message.length; i++) {
            alert("Error... "+response.messages.message[i].code + ':' + response.messages.message[i].text);
            console.log(response.messages.message[i].code + ':' + response.messages.message[i].text);
        }
    } else {
        useOpaqueData(response.opaqueData);
        $("#checkout_form").submit();
    }
}

function useOpaqueData(responseData) {
    // This is where you would set the data descriptor & data value to be posted back to your server
    console.log(responseData.dataDescriptor);
    console.log(responseData.dataValue);
    $("#response_data_descriptor").val(responseData.dataDescriptor);
    $("#response_data_value").val(responseData.dataValue);
}    

</script>

<script type="text/javascript" src="https://js.authorize.net/v1/Accept.js" charset="utf-8"></script>

* In the processing script...

require '/home/acct/vendor/autoload.php';
use net\authorize\api\contract\v1 as AnetAPI;
use net\authorize\api\controller as AnetController;

function chargeCreditCard($amount) {
    // variables defined in calling script
    global $auth_bill_fname, $auth_bill_lname, $auth_bill_address, $auth_bill_city, $auth_bill_state, $auth_bill_zip, $auth_bill_country;
    global $auth_bill_rdd, $auth_bill_rdv;
    
    // Common setup for API credentials
    $merchantAuthentication = new AnetAPI\MerchantAuthenticationType();
    $merchantAuthentication->setName(MERCHANT_LOGIN_ID);
    $merchantAuthentication->setTransactionKey(MERCHANT_TRANSACTION_KEY);
    $refId = 'ref' . time();
    
    // Create the payment data for a payment nonce
    $opaqueData = new AnetAPI\OpaqueDataType();
    $opaqueData->setDataDescriptor($auth_bill_rdd);
    $opaqueData->setDataValue($auth_bill_rdv);
    $paymentOne = new AnetAPI\PaymentType();
    $paymentOne->setOpaqueData($opaqueData);
    
    $order = new AnetAPI\OrderType();
    $order->setDescription("New Order");
    
    // Set the customer's Bill To address
    $customerAddress = new AnetAPI\CustomerAddressType();
    $customerAddress->setFirstName($auth_bill_fname);
    $customerAddress->setLastName($auth_bill_lname);
    $customerAddress->setCompany("");
    $customerAddress->setAddress($auth_bill_address);
    $customerAddress->setCity($auth_bill_city);
    $customerAddress->setState($auth_bill_state);
    $customerAddress->setZip($auth_bill_zip);
    $customerAddress->setCountry($auth_bill_country);
    
    //create a transaction
    $transactionRequestType = new AnetAPI\TransactionRequestType();
    $transactionRequestType->setTransactionType("authCaptureTransaction");
    $transactionRequestType->setCustomerIP($_SERVER["REMOTE_ADDR"]);
    $transactionRequestType->setAmount($amount);
    $transactionRequestType->setOrder($order);
    $transactionRequestType->setPayment($paymentOne);
    $transactionRequestType->setBillTo($customerAddress);
    
    $request = new AnetAPI\CreateTransactionRequest();
    $request->setMerchantAuthentication($merchantAuthentication);
    $request->setRefId($refId);
    $request->setTransactionRequest($transactionRequestType);
    $controller = new AnetController\CreateTransactionController($request);
    
    $response = $controller->executeWithApiResponse(\net\authorize\api\constants\ANetEnvironment::PRODUCTION); // SANDBOX or PRODUCTION
    
    return $response;
}

$authorized = false;
$pending = false;

$auth_charge_response = chargeCreditCard( $cartTotal );
if ($auth_charge_response != null) {
    if($auth_charge_response->getMessages()->getResultCode() == "Ok") {
        $tresponse = $auth_charge_response->getTransactionResponse();
        if ($tresponse != null && $tresponse->getMessages() != null) {
            $tresponse_code = $tresponse->getResponseCode();
            if ($tresponse_code == 1) {
                $authorized = true;
            } elseif ($tresponse_code == 4) {
                $pending = true;
            }
        } else {
            if($tresponse->getErrors() != null) {
                $auth_declined_reason_text = $tresponse->getErrors()[0]->getErrorText();
            } else {
                $auth_declined_reason_text = "unknown";
            }
        }
    } else {
        $tresponse = $auth_charge_response->getTransactionResponse();
        if($tresponse != null && $tresponse->getErrors() != null) {
            $auth_declined_reason_text = $tresponse->getErrors()[0]->getErrorText();
        } else {
            $auth_declined_reason_text = $auth_charge_response->getMessages()->getMessage()[0]->getText();
        }
    }
}

if( $authorized || $pending ){
    // order processing code goes here
} else {
    echo $auth_declined_reason_text;
}