When I try to create a two separate custom page types I recieve this error "Something went wrong Unexpected token <". we have three different environments set up and this is only happening on production. when i open developer tools and look at the console i get a syntaxerror :unexpected token in dojo.js. the page code is below. >

Store credit page 

[ContentType(DisplayName = "Store Credit Container Page", GUID = "7cba2649-7df2-457c-9183-62ae3fca2e75", Description = "Use this page as a starting point to give store credits. Only one of these pages will need to be made.")]
    [AvailableContentTypes(Include = new[] { typeof(ArchivedStoreCreditPage), typeof(ActiveStoreCreditPage) })]
    public class StoreCreditContainerPage : PageData, INoCategory
    {
        
                [CultureSpecific]
                [Display(
                    Name = "Main body",
                    Description = "The main body will be shown in the main content area of the page, using the XHTML-editor you can insert for example text, images and tables.",
                    GroupName = SystemTabNames.Content,
                    Order = 1)]
                public virtual XhtmlString MainBody { get; set; }
        

    }

Custome error page

[ContentType(DisplayName = "ErrorPage", GUID = "dc36998e-2eeb-4314-b92a-a9e58302a02b", Description = "Default Error Page")]
    public class ErrorPage : SitePageData, INoCategory
    {
        
                [CultureSpecific]
                [Display(Name = "Heading", Description = "Heading For the error page", GroupName = SystemTabNames.Content,Order = 10)]
                public virtual string Heading { get; set; }

                [CultureSpecific]
                [Display(Name = "Message", Description = "Main Html Errormessage", GroupName = SystemTabNames.Content, Order = 20)]
                public virtual XhtmlString Message { get; set; }
        
    }