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

[Marcel]

Hello, I'm trying to update the version of Telerik reports in my app by following the documentation steps:

https://docs.telerik.com/reporting/installation-upgrading-newer-version#old-projects-manual-upgrade .

.. however, after generating the .trdx file, when I try to render the file in html it shows the error:

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

I have not found a solution to this in the documentation yet, could you help me?

 

 

[Todor]

Hi Marcel,

The error may be related to the version of Newtonsoft.Json referred in the project.
Note that starting with Telerik Reporting R2 2018 (12.1.18.516), the required version of Newtonsoft.Json is 9.0.1 or later, as compared to 4.5.11.15520 or later before.

Regards,
Todor
Progress Telerik

[Nathan]

We are having the same issue since the upgrade.  Our report server is erroring out with the message below:

{"Message":"An error has occurred.","ExceptionMessage":"The 'ObjectContent`1' type failed to serialize the response body for content type 'application/json; charset=utf-8'.","ExceptionType":"System.InvalidOperationException","StackTrace":null,"InnerException":{"Message":"An error has occurred.","ExceptionMessage":"Entry point was not found.","ExceptionType":"System.EntryPointNotFoundException","StackTrace":" at Newtonsoft.Json.Serialization.IContractResolver.ResolveContract(Type type)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.GetContractSafe(Object value)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.Serialize(JsonWriter jsonWriter, Object value, Type objectType)\r\n at Newtonsoft.Json.JsonSerializer.SerializeInternal(JsonWriter jsonWriter, Object value, Type objectType)\r\n at Newtonsoft.Json.JsonSerializer.Serialize(JsonWriter jsonWriter, Object value)\r\n at System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.WriteToStream(Type type, Object value, Stream writeStream, Encoding effectiveEncoding)\r\n at System.Net.Http.Formatting.JsonMediaTypeFormatter.WriteToStream(Type type, Object value, Stream writeStream, Encoding effectiveEncoding)\r\n at System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.WriteToStream(Type type, Object value, Stream writeStream, HttpContent content)\r\n at System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.WriteToStreamAsync(Type type, Object value, Stream writeStream, HttpContent content, TransportContext transportContext, CancellationToken cancellationToken)\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.GetResult()\r\n at System.Web.Http.WebHost.HttpControllerHandler.d__22.MoveNext()"}}

[Todor]

Hello Nathan,

The issue should be resolved after updating the Newtonsoft.Json NuGet package to version 9.0.1.

Regards,
Todor
Progress Telerik