Email Issues: Issue with namespace

Hello,

While trying to add in client side order confirmation emails into our updated live system (to v12.5.1), we started to get the error message below. We had this working in our test system, but it now seems to be broken. Has anyone encountered this situation and found a solution? The template is having issues finding the namespace Tessitura.WebAPI for using AddressControl.

 

--code used for namespace--

 

<%@ Page Language="C#" AutoEventWireup="true" Inherits="Tessitura.WebAPI.Controls.ConfirmationEmailPage" EnableViewState="false" %>

<%@ Register TagPrefix="tweb" Namespace="Tessitura.WebAPI.Controls" Assembly="Tessitura" %>

<%@ Import Namespace="Tessitura.WebAPI" %>

<%

    if (String.IsNullOrEmpty(Subject))

    {

        Subject = "TEST";

    }

 

    uxDelivery.Address = OrderData.DeliveryAddress;

    uxBilling.Address = OrderData.BillingAddress;

%>

 

--error--

 

<b> Description: </b>An error occurred during the compilation of a resource required to service this request.

Please review the following specific error details and modify your source code appropriately.

<br><br>

 

<b> Compiler Error Message: </b>CS0234: The type or namespace name &#