Unable to load one or more of the requested types.

[olaj]

I have seen some other posts about this error but i can't figure out how to solve it.

I have implemented ReactJS.net according to the tutorial.

`using React;

[assembly: WebActivatorEx.PreApplicationStartMethod(typeof(AlternativeTo.ReactConfig), "Configure")]

namespace AlternativeTo {
public static class ReactConfig {
public static void Configure() {
ReactSiteConfiguration.Configuration
.AddScript("~/ReactTest/like_button.js");
}
}
}`

I have installed the nuget packages and so on but the first thing that happens when i load the project is that i get.

[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.RuntimeModule.GetTypes() +9 System.Reflection.Assembly.GetTypes() +61 React.<>c.<InitializeIoC>b__2_0(Assembly assembly) +12 System.Linq.<SelectManyIterator>d__172.MoveNext() +170
System.Linq.WhereEnumerableIterator1.MoveNext() +87 React.Initializer.InitializeIoC(Func2 requestLifetimeRegistration) +275
React.Web.WebInitializer.Initialize() +43

[TargetInvocationException: Exception has been thrown by the target of an invocation.]
System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor) +0
System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments) +87
System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) +101
WebActivatorEx.BaseActivationMethodAttribute.InvokeMethod() +73
WebActivatorEx.ActivationManager.RunActivationMethods(Boolean designerMode) +637
WebActivatorEx.ActivationManager.Run() +101

[InvalidOperationException: The pre-application start initialization method Run on type WebActivatorEx.ActivationManager threw an exception with the following error message: Exception has been thrown by the target of an invocation..]
System.Web.Compilation.BuildManager.InvokePreStartInitMethodsCore(ICollection1 methods, Func1 setHostingEnvironmentCultures) +614
System.Web.Compilation.BuildManager.InvokePreStartInitMethods(ICollection`1 methods) +138
System.Web.Compilation.BuildManager.CallPreStartInitMethods(String preStartInitListPath, Boolean& isRefAssemblyLoaded) +163
System.Web.Compilation.BuildManager.ExecutePreAppStart() +156
System.Web.Hosting.HostingEnvironment.Initialize(ApplicationManager appManager, IApplicationHost appHost, IConfigMapPathFactory configMapPathFactory, HostingEnvironmentParameters hostingParameters, PolicyLevel policyLevel, Exception appDomainCreationException) +695

[HttpException (0x80004005): The pre-application start initialization method Run on type WebActivatorEx.ActivationManager threw an exception with the following error message: Exception has been thrown by the target of an invocation..]
System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +658
System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +89
System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +189`

If I change the IIS App Pool to disable support for 32bit i get this error instead.

`[TinyIoCResolutionException: Unable to resolve type: React.IReactEnvironment]
React.TinyIoC.TinyIoCContainer.ResolveInternal(TypeRegistration registration, NamedParameterOverloads parameters, ResolveOptions options) +821
React.TinyIoC.TinyIoCContainer.Resolve() +46
React.ReactEnvironment.get_GetCurrentOrThrow() +66

[ReactNotInitialisedException: ReactJS.NET has not been initialised correctly. Please ensure you have called services.AddReact() and app.UseReact() in your Startup.cs file.]
React.ReactEnvironment.get_GetCurrentOrThrow() +158
React.Web.Mvc.<>c__DisplayClass2_01.<React>b__0(TextWriter writer) +359 React.Web.Mvc.ActionHtmlString.ToHtmlString() +201 System.Web.WebPages.WebPageBase.Write(Object value) +103 ASP._Page_Views_Start_Index_cshtml.Execute() in c:\GitHub\AlternativeTo\AlternativeTo2\AlternativeToWeb\Views\Start\Index.cshtml:85 System.Web.WebPages.WebPageBase.ExecutePageHierarchy() +252 System.Web.Mvc.WebViewPage.ExecutePageHierarchy() +148 System.Web.WebPages.StartPage.ExecutePageHierarchy() +86 System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage) +107 StackExchange.Profiling.Mvc.WrappedView.Render(ViewContext viewContext, TextWriter writer) +160 System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context) +375 System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult) +88
System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult) +775 System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList1 filters, ActionResult actionResult) +81
System.Web.Mvc.Async.<>c__DisplayClass3_1.b__5(IAsyncResult asyncResult) +188
System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +38
System.Web.Mvc.<>c.b__152_1(IAsyncResult asyncResult, ExecuteCoreState innerState) +26
System.Web.Mvc.Async.WrappedAsyncVoid1.CallEndDelegate(IAsyncResult asyncResult) +73 System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +52 System.Web.Mvc.Async.WrappedAsyncVoid1.CallEndDelegate(IAsyncResult asyncResult) +39
System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +38
System.Web.Mvc.<>c.b__20_1(IAsyncResult asyncResult, ProcessRequestState innerState) +40
System.Web.Mvc.Async.WrappedAsyncVoid1.CallEndDelegate(IAsyncResult asyncResult) +73 System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +38 System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +648 System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) +213 System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +131

As far as i understand it seems to have something todo with the "JavascriptEngineSwitcher" but i have no idea how to solve it? #414 this thread seems to mention something about setting a default engine but where do i do that and what should i use?

I have read #409 but tbh i dont not really understand what actions i should take based on that.

Sorry but i'm also new to this library and new to JavascriptEngineSwitcher so i don't have that much background information. Let me know if you need more code and so on.

[dustinsoftware]

There is a getting started page that may be helpful here.. would you mind trying to build one of the sample projects in this repo? Those show how to set up ReactJS.NET correctly.