React has not been loaded correctly. Please expose your version of React as global variables named 'React', 'ReactDOM' and 'ReactDOMServer', or enable the 'LoadReact' configuration option to use the built-in version of React.

[thecyclingfarmer]

We are experiencing this issue after we upgraded React and ReactDOM to 16.4.1. We bundle our own React with webpack and we can verify that React, ReactDOM and ReactDOMServer are exposed as global variables. We narrowed down the problem to the ReactDom version, after we backed to ReactDOM 16.4.0 the issue disappears (React still on 16.4.1). Any ideas?

Thanks!

[dustinsoftware]

I’ll see if I can repro with 16.4.1. Thanks for reporting the issue.

[benverhees]

We are experiencing the same issue, 16.4.0 works fine, 16.4.1 gives this error when calling ReactEnvironment.Current

[ReactNotInitialisedException: React has not been loaded correctly. Please expose your version of React as global variables named 'React', 'ReactDOM' and 'ReactDOMServer', or enable the 'LoadReact' configuration option to use the built-in version of React.]
   React.JavaScriptEngineFactory.EnsureReactLoaded(IJsEngine engine) +151
   React.JavaScriptEngineFactory.InitialiseEngine(IJsEngine engine) +215
   JSPool.JsPool`2.CreateEngine() +255
   JSPool.JsPool`2.PopulateEngines() +23
   JSPool.JsPool`2..ctor(JsPoolConfig`1 config) +265
   React.JavaScriptEngineFactory.CreatePool() +624
   React.JavaScriptEngineFactory..ctor(JsEngineSwitcher jsEngineSwitcher, IReactSiteConfiguration config, IFileSystem fileSystem) +177
   lambda_method(Closure , Object[] ) +187
   React.TinyIoC.TinyIoCContainer.ConstructType(Type requestedType, Type implementationType, ConstructorInfo constructor, NamedParameterOverloads parameters, ResolveOptions options) +618

[TinyIoCResolutionException: Unable to resolve type: React.JavaScriptEngineFactory]
   React.TinyIoC.TinyIoCContainer.ConstructType(Type requestedType, Type implementationType, ConstructorInfo constructor, NamedParameterOverloads parameters, ResolveOptions options) +948
   React.TinyIoC.SingletonFactory.GetObject(Type requestedType, TinyIoCContainer container, NamedParameterOverloads parameters, ResolveOptions options) +157
   React.TinyIoC.TinyIoCContainer.ResolveInternal(TypeRegistration registration, NamedParameterOverloads parameters, ResolveOptions options) +855
   React.TinyIoC.TinyIoCContainer.ConstructType(Type requestedType, Type implementationType, ConstructorInfo constructor, NamedParameterOverloads parameters, ResolveOptions options) +520

[TinyIoCResolutionException: Unable to resolve type: React.ReactEnvironment]
   React.TinyIoC.TinyIoCContainer.ConstructType(Type requestedType, Type implementationType, ConstructorInfo constructor, NamedParameterOverloads parameters, ResolveOptions options) +794
   React.TinyIoC.CustomObjectLifetimeFactory.GetObject(Type requestedType, TinyIoCContainer container, NamedParameterOverloads parameters, ResolveOptions options) +157
   React.TinyIoC.TinyIoCContainer.ResolveInternal(TypeRegistration registration, NamedParameterOverloads parameters, ResolveOptions options) +855
   React.TinyIoC.TinyIoCContainer.Resolve() +54

[dustinsoftware]

I believe your issue is related to #555 , I'll post updates there

[dustinsoftware]

Discussion moved to #555