dashboard broke after excecution of a workflow about elsa-designer HOT 4 OPEN

Can you elaborate on the broken dashboard part? What do you see? A screenshot might help. And perhaps there is a stack trace you can share?

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just a blank page.
on the browser console i've this message : The character encoding of the plain text document was not declared. The document will render with garbled text in some browser configurations if the document contains characters from outside the US-ASCII range. The character encoding of the file needs to be declared in the transfer protocol or file needs to use a byte order mark as an encoding signature.

the problem is that i've make a mistake writing the last node expression, but i've no clue of what error is.

in another attempt im now writing this expression "OK: " + Activities.CreaAsset.Asset.Id (javascript expression)
the debug console show this:
Elsa.Exceptions.WorkflowException: Error while evaluating JavaScript expression ""OK :" + Activities.CreaAsset.Asset.Id". Message: Activities is not defined
at Elsa.Expressions.WorkflowExpressionEvaluator.EvaluateAsync(IWorkflowExpression expression, Type type, WorkflowExecutionContext workflowExecutionContext, CancellationToken cancellationToken)
at Elsa.Extensions.WorkflowExpressionEvaluatorExtensions.EvaluateAsync[T](IWorkflowExpressionEvaluator evaluator, IWorkflowExpression1 expression, WorkflowExecutionContext workflowExecutionContext, CancellationToken cancellationToken) at Elsa.Activities.Http.Activities.WriteHttpResponse.OnExecuteAsync(WorkflowExecutionContext workflowContext, CancellationToken cancellationToken) at Elsa.Services.ActivityInvoker.InvokeAsync(WorkflowExecutionContext workflowContext, IActivity activity, Func2 invokeAction)"

after that it also broke the page as the previous attempt

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this is the project
TestElsa2.zip

it contains:

• EF context for the ELSA tables
• EF context for my business logic persistance
• 2 custom activities (create, delete)

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i've tried to make the workflow in code:
public class InserimentoAssetWorkflow : IWorkflow { public void Build(IWorkflowBuilder builder) { builder .StartWith<ReceiveHttpRequest>( x => { x.Method = HttpMethod.Post.Method; x.Path = new Uri("/prova", UriKind.Relative); x.ReadContent = true; } ) .Then<SetVariable>( x => { x.VariableName = "Document"; x.ValueExpression = new JavaScriptExpression<ExpandoObject>("lastResult().Body"); } ) .Then<CreaAsset>( x => { x.Name = "CrazioneAsset"; x.Codice = new JavaScriptExpression<string>("Document.Codice"); x.Descrizione = new JavaScriptExpression<string>("Document.Descrizione"); x.Dealer = new JavaScriptExpression<string>("Document.Dealer"); } ) .Then<WriteHttpResponse>( x => { x.Content = new LiquidExpression<string>( "OK. ID: {{ Activities.CrazioneAsset.Asset.Id }} inserito correttamente. " ); x.ContentType = "text/html"; x.StatusCode = HttpStatusCode.OK; x.ResponseHeaders = new LiteralExpression("X-Powered-By=Elsa Workflows"); } ); } }

the output console write:
Elsa.Exceptions.WorkflowException: Error while evaluating Liquid expression "OK. ID: {{ Activities.CrazioneAsset.Asset }} inserito correttamente. ". Message: Object reference not set to an instance of an object. at Elsa.Expressions.WorkflowExpressionEvaluator.EvaluateAsync(IWorkflowExpression expression, Type type, WorkflowExecutionContext workflowExecutionContext, CancellationToken cancellationToken) at Elsa.Extensions.WorkflowExpressionEvaluatorExtensions.EvaluateAsync[T](IWorkflowExpressionEvaluator evaluator, IWorkflowExpression1 expression, WorkflowExecutionContext workflowExecutionContext, CancellationToken cancellationToken)
at Elsa.Activities.Http.Activities.WriteHttpResponse.OnExecuteAsync(WorkflowExecutionContext workflowContext, CancellationToken cancellationToken)
at Elsa.Services.ActivityInvoker.InvokeAsync(WorkflowExecutionContext workflowContext, IActivity activity, Func2 invokeAction)

so i'm thinking i'm writing something wrong but i've no clue of what.

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