I have a multitreenode picker that is getting blog posts. On the blog posts themselves they have tags. I can't figure out how to properly render those tags. I get this error "Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.NullReferenceException: Object reference not set to an instance of an object." I'm not sure how to make this work any help would be appreciated. The error happens at this line of code "foreach(var tag in post.GetPropertyValue<>

        @if (node.HasValue("featuredPosts"))
        {
            var blog = home.Descendant("blog");
                <a href="#" style="visibility: hidden;">@node.GetPropertyValue("blogText", audiences.GetPropertyValue("blogText", "Blog"))</a>
                <div>
                    <div id="audience-blog" class="row global-spacing">
                        <div class="section-header column small-12">
                            <h1>@Html.Raw(node.GetPropertyValue("blogHeader", "DIY <span>Blog</span>"))</h1>
                        </div>

                        <div id="blog-articles">
                            @foreach (var post in node.GetPropertyValue<IEnumerable<IPublishedContent>>("featuredPosts"))
                            {
                            var productMultiNodeTree = post.GetPropertyValue<IEnumerable<IPublishedContent>>("productsUsed");
                                <div class="blog-item column small-12 medium-6">
                                    <a href="@post.Url">
                                        @if (post.HasValueImage("image"))
                                        {
                                            var i = post.GetPropertyValue<IPublishedContent>("image");
                                            <img src="@i.Url" alt="@i.GetPropertyValue("altTag")">
                                        }
                                        <h3 class="h5">@post.Name</h3>
                                        <div class="blog-type">
                                   <ul class="product">
                                    @foreach(var link in productMultiNodeTree) 
                                        { 
                                        <li><a href="@link.Url">@link.Name</a></li>
                                        }
                                    </ul>
                                    <ul class="project">
                                    @if(post.HasValue("tags")){
                                        foreach(var tag in post.GetPropertyValue<IEnumerable<string>>("tags")){
                                            <li><a href="@blogNode.Url?tag=@tag">@tag</a></li>
                                        }
                                    }
                                    </ul>
                                        </div>
                                    </a>
                                </div>
                            }
                        </div>
                        @if (blog != null && blog.IsVisible())
                        {
                            <div class="column small-12 text-center">
                                <a href="@blog.Url" class="button">
                                    @node.GetPropertyValue("viewFullBlogText", audiences.GetPropertyValue("viewFullBlogText", "View Full Blog"))
                                </a>
                            </div>
                        }
                    </div>
                </div>
        }