Hi I'm trying to use Umbraco Model Builder API following this Umbraco TV https://umbraco.tv/videos/umbraco-v7/implementor/working-with-umbraco-data/working-with-models-builder/what-is-models-builder/

Problem is I get the following error.

> UmbracoModelsBuilder: Starting v3.0.6.97 27/02/2019 00:59:36.
> UmbracoModelsBuilder: UmbracoModelsBuilder failed to generate code:
> AggregateException: One or more errors occurred. UmbracoModelsBuilder:
> at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean
> includeTaskCanceledExceptions)    at
> System.Threading.Tasks.Task`1.GetResultCore(Boolean
> waitCompletionNotification)    at
> System.Threading.Tasks.Task`1.get_Result()    at
> Umbraco.ModelsBuilder.Api.ApiClient.ValidateClientVersion()    at
> Umbraco.ModelsBuilder.CustomTool.CustomTool.UmbracoModelsBuilder.GenerateRaw(String
> wszInputFilePath, String wszDefaultNamespace, IntPtr[]
> rgbOutputFileContents, UInt32& pcbOutput, String& errMsg)
> UmbracoModelsBuilder: Inner: HttpRequestException: An error occurred
> while sending the request. UmbracoModelsBuilder: 
> UmbracoModelsBuilder: Inner: WebException: Unable to connect to the
> remote server UmbracoModelsBuilder:    at
> System.Net.HttpWebRequest.EndGetRequestStream(IAsyncResult
> asyncResult, TransportContext& context)    at
> System.Net.Http.HttpClientHandler.GetRequestStreamCallback(IAsyncResult
> ar) UmbracoModelsBuilder: Inner: SocketException: No connection could
> be made because the target machine actively refused it 127.0.0.1:51022
> UmbracoModelsBuilder:    at
> System.Net.Sockets.Socket.InternalEndConnect(IAsyncResult asyncResult)
> at System.Net.Sockets.Socket.EndConnect(IAsyncResult asyncResult)   
> at System.Net.ServicePoint.ConnectSocketInternal(Boolean
> connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress&
> address, ConnectSocketState state, IAsyncResult asyncResult,
> Exception& exception) UmbracoModelsBuilder: AggregateInner:
> HttpRequestException: An error occurred while sending the request.
> UmbracoModelsBuilder:

Web.config

 <add key="Umbraco.ModelsBuilder.Enable" value="true"/>
    <add key="Umbraco.ModelsBuilder.ModelsMode" value="Nothing"/>
    <add key="Umbraco.ModelsBuilder.EnableApi" value="true"/>

So its telling me that connection was refused UmbracoModelsBuilder: Inner: SocketException: No connection could be made because the target machine actively refused it 127.0.0.1:51022.

Is the Umbraco TV Working with Models Builder still valid for version 8

Thanks

------------Update-------------

I have created an Umbraco 7 website, followed the same steps as above and the modelbuilder works.

This issue seems to be Umbraco 8 bug