problem with json - Production server only?

[hookbeak]

Hi,

clean project and installed latest version from nuget

used this code:

`
Dim listid = "mylistidhere"
Dim APIKey = "apikeyhere"
Dim email = "myemail@email.com"

        Dim mailChimp = New MailChimpManager(APIKey)
        Dim member = New Member() With {.EmailAddress = Email, .StatusIfNew = Status.Subscribed, .Status = Status.Subscribed}


        member.MergeFields.Add("FNAME", "Andy")
        member.MergeFields.Add("LNAME", "TEST01")

        Dim transmitResult = mailChimp.Members.AddOrUpdateAsync(ListID, member)
        Return transmitResult.Result.Status.ToString`

when running locally, it works. returning "subscribed"

when uploaded i get the following error:

A-System.AggregateException: One or more errors occurred. ---> Newtonsoft.Json.JsonReaderException: Unexpected character encountered while parsing value: <. Path '', line 0, position 0. at Newtonsoft.Json.JsonTextReader.ParseValue() at Newtonsoft.Json.JsonReader.ReadForType(JsonContract contract, Boolean hasConverter) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize(JsonReader reader, Type objectType, Boolean checkAdditionalContent) at Newtonsoft.Json.JsonSerializer.DeserializeInternal(JsonReader reader, Type objectType) at Newtonsoft.Json.JsonSerializer.Deserialize[T](JsonReader reader) at MailChimp.Net.Core.Helper.Deserialize[T](Stream stream) at MailChimp.Net.Core.Helper.d__0.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at MailChimp.Net.Logic.MemberLogic.d__2.MoveNext() --- End of inner exception stack trace --- at System.Threading.Tasks.Task1.GetResultCore(Boolean waitCompletionNotification) at MailchimpV3.NewSubscriber(String ListID, String Email) in D:\websites$live_sites\mywebsite.com\App_Code\MailchimpV3.vb:line 336 ---> (Inner Exception #0) Newtonsoft.Json.JsonReaderException: Unexpected character encountered while parsing value: <. Path '', line 0, position 0. at Newtonsoft.Json.JsonTextReader.ParseValue() at Newtonsoft.Json.JsonReader.ReadForType(JsonContract contract, Boolean hasConverter) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize(JsonReader reader, Type objectType, Boolean checkAdditionalContent) at Newtonsoft.Json.JsonSerializer.DeserializeInternal(JsonReader reader, Type objectType) at Newtonsoft.Json.JsonSerializer.Deserialize[T](JsonReader reader) at MailChimp.Net.Core.Helper.Deserialize[T](Stream stream) at MailChimp.Net.Core.Helper.d__0.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at MailChimp.Net.Logic.MemberLogic.d__2.MoveNext()<---`

Any ideas? i'm baffled by it...

To reinterate this only happens on the production server, on my local machine it works perfectly.

I've previously used this across multiple sites and all sites have now stopped working with no code changes. Is anyone aware of recent IIS updates that stop this code from working?

[guslandt]

I'm having this exact same issue. Same error message, only on production server.
Was anything discovered as to the solution to this issue?