Hi there gurus.

I am working on my first project with Archetype - so bit of a newbie here :-) Umbraco is working 7.4.3 and Archetype is 1.13.1.

I have created a new data-type (Openinghours). I then added monday through sunday with a textstring.

Should be simple enough :-) But when I try and use it in a document under content I get the following error.

**An error occured**

The 'ObjectContent`1' type failed to serialize the response body for content type 'application/json; charset=utf-8'.

**Exception Details**
System.InvalidOperationException: The 'ObjectContent`1' type failed to serialize the response body for content type 'application/json; charset=utf-8'. 

**Stacktrace**



**Inner Exception**

System.NotImplementedException: This method must be implemented if a view is not explicitly set at Umbraco.Core.PropertyEditors.PropertyEditor.CreateValueEditor() at MW.Umbraco.EmbededResources.PropertyEditors.BasePropertyEditor.CreateValueEditor() at Archetype.Api.ArchetypeDataTypeController.<GetAllPropertyEditors>b__0(PropertyEditor x) at System.Linq.Enumerable.WhereSelectListIterator`2.MoveNext() at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeList(JsonWriter writer, IEnumerable values, JsonArrayContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty) at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.Serialize(JsonWriter jsonWriter, Object value, Type objectType) at Newtonsoft.Json.JsonSerializer.SerializeInternal(JsonWriter jsonWriter, Object value, Type objectType) at System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.WriteToStream(Type type, Object value, Stream writeStream, Encoding effectiveEncoding) at System.Net.Http.Formatting.JsonMediaTypeFormatter.WriteToStream(Type type, Object value, Stream writeStream, Encoding effectiveEncoding) at System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.WriteToStreamAsync(Type type, Object value, Stream writeStream, HttpContent content, TransportContext transportContext, CancellationToken cancellationToken)

--- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Web.Http.WebHost.HttpControllerHandler.WriteBufferedResponseContentAsync>d__1b.MoveNext()

It is showing as soon as I click the document-type and want to input data. Any good ideas as I have no idea on how to troubleshoot this problem?

Best regards Jimmy Dan Mortensen