Hello,

We just upgraded to the commerce version 13.27.0 and started getting the below error: If I delete the "EPiServer.Commerce.UI.CustomerService.zip" from  modules > _protected website works fine but Commerce UI does not work in the backend (as expected) but when adding the file back - error back again. Appreciate any help.

[ReflectionTypeLoadException: Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information.]
   System.Reflection.RuntimeModule.GetTypes(RuntimeModule module) +0
   System.Reflection.Assembly.GetTypes() +113
   EPiServer.Commerce.UI.CustomerService.Services.RouteRegistry.RegisterRoutes(Assembly assembly, String routePrefix, HttpRouteCollection routes) +114
   System.Web.Http.GlobalConfiguration.Configure(Action`1 configurationCallback) +46
   EPiServer.Commerce.UI.CustomerService.Initialization.InitializationModule.Global_RoutesRegistering(Object sender, RouteRegistrationEventArgs e) +381
   EPiServer.Global.OnRoutesRegistrating(RouteCollection routes) +78
   EPiServer.Global..ctor() +174
   ASP.global_asax..ctor() +46

[TargetInvocationException: Exception has been thrown by the target of an invocation.]
   System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck) +0
   System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark) +142
   System.Activator.CreateInstance(Type type, Boolean nonPublic) +107
   System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes, StackCrawlMark& stackMark) +1476
   System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes) +186
   System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture) +28
   System.Web.HttpRuntime.CreateNonPublicInstance(Type type, Object[] args) +80
   System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +182
   System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +369

[HttpException (0x80004005): Exception has been thrown by the target of an invocation.]
   System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +532
   System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +111
   System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +724