Our.Umbraco.SuperValueConverters front end error in Umbraco 7.15.1

error.txt

[ReflectionTypeLoadException: Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information.]
   Umbraco.Core.Cache.HttpRequestCacheProvider.GetCacheItem(String cacheKey, Func`1 getCacheItem) +288
   Umbraco.Web.PublishedCache.XmlPublishedCache.XmlPublishedContent.Get(XmlNode node, Boolean isPreviewing) +155
   Umbraco.Web.PublishedCache.XmlPublishedCache.PublishedContentCache.GetById(UmbracoContext umbracoContext, Boolean preview, Int32 nodeId) +68
   Umbraco.Web.PublishedCache.XmlPublishedCache.PublishedContentCache.DetermineIdByRoute(UmbracoContext umbracoContext, Boolean preview, String route, Boolean hideTopLevelNode) +189
   Umbraco.Web.PublishedCache.XmlPublishedCache.PublishedContentCache.GetByRoute(UmbracoContext umbracoContext, Boolean preview, String route, Nullable`1 hideTopLevelNode) +202
   Umbraco.Web.Routing.ContentFinderByNiceUrl.FindContent(PublishedContentRequest docreq, String route) +207
   Umbraco.Web.Routing.ContentFinderByNiceUrl.TryFindContent(PublishedContentRequest docRequest) +216
   Umbraco.Web.Routing.PublishedContentRequestEngine.<FindPublishedContent>b__17_0(IContentFinder finder) +15
   System.Linq.Enumerable.Any(IEnumerable`1 source, Func`2 predicate) +146
   Umbraco.Web.Routing.PublishedContentRequestEngine.FindPublishedContent() +240
   Umbraco.Web.Routing.PublishedContentRequestEngine.FindPublishedContentAndTemplate() +250
   Umbraco.Web.Routing.PublishedContentRequestEngine.PrepareRequest() +107
   Umbraco.Web.UmbracoModule.ProcessRequest(HttpContextBase httpContext) +361
   Umbraco.Web.UmbracoModule.<Init>b__12_3(Object sender, EventArgs e) +80
   System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +141
   System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) +48
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +71