[FileLoadException: Cannot resolve dependency to assembly 'Microsoft.Extensions.DependencyInjection.Abstractions, Version=2.1.1.0, Culture=neutral, PublicKeyToken=adb9793829ddae60' because it has not been preloaded. When using the ReflectionOnly APIs, dependent assemblies must be pre-loaded or loaded on demand through the ReflectionOnlyAssemblyResolve event.]
   System.Reflection.RuntimeAssembly.GetType(RuntimeAssembly assembly, String name, Boolean throwOnError, Boolean ignoreCase, ObjectHandleOnStack type) +0
   System.Reflection.RuntimeAssembly.GetType(String name, Boolean throwOnError, Boolean ignoreCase) +55
   Owin.Loader.DefaultLoader.GetDefaultConfigurationString(Func`2 defaultTypeNames) +963
   Owin.Loader.DefaultLoader.LoadImplementation(String startupName) +154
   Owin.Loader.DefaultLoader.Load(String startupName) +23
   Microsoft.Owin.Host.SystemWeb.OwinBuilder.Build() +95
   System.Lazy`1.CreateValue() +734
   System.Lazy`1.LazyInitValue() +189
   Microsoft.Owin.Host.SystemWeb.OwinHttpModule.Init(HttpApplication context) +86
   System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers) +587
   System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context) +173
   System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +255
   System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +347
[HttpException (0x80004005): Cannot resolve dependency to assembly 'Microsoft.Extensions.DependencyInjection.Abstractions, Version=2.1.1.0, Culture=neutral, PublicKeyToken=adb9793829ddae60' because it has not been preloaded. When using the ReflectionOnly APIs, dependent assemblies must be pre-loaded or loaded on demand through the ReflectionOnlyAssemblyResolve event.]
   System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +552
   System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +122
   System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +737