Bug: The requested operation requires an element of type 'String', but the target element has type 'Object'.

[JP-droidic]

Hi guys

I'm getting the message bellow if an agent has attached a vectorStore

OpenAIAssistantAgent agent =
            await OpenAIAssistantAgent.CreateAsync(
                kernel: new Kernel(),
                GetClientProvider(),
                new OpenAIAssistantDefinition(openAiOptions.ChatModelId)
                {
                    Instructions = instructions,
                    Name = name,
                    EnableFileSearch = !string.IsNullOrEmpty(vectorStoreId),
                    EnableCodeInterpreter = enableCodeInterpreter,
                    VectorStoreId = vectorStoreId
                });

The error happens when I try to invoke the chat.

System.InvalidOperationException: The requested operation requires an element of type 'String', but the target element has type 'Object'. at System.Text.Json.ThrowHelper.ThrowJsonElementWrongTypeException(JsonTokenType expectedType, JsonTokenType actualType) at System.Text.Json.JsonDocument.GetString(Int32 index, JsonTokenType expectedType) at OpenAI.Assistants.InternalRunStepDeltaStepDetailsToolCallsFileSearchObject.DeserializeInternalRunStepDeltaStepDetailsToolCallsFileSearchObject(JsonElement element, ModelReaderWriterOptions options) at OpenAI.Assistants.InternalRunStepDeltaStepDetailsToolCallsObjectToolCallsObject.DeserializeInternalRunStepDeltaStepDetailsToolCallsObjectToolCallsObject(JsonElement element, ModelReaderWriterOptions options) at OpenAI.Assistants.InternalRunStepDeltaStepDetailsToolCallsObject.DeserializeInternalRunStepDeltaStepDetailsToolCallsObject(JsonElement element, ModelReaderWriterOptions options) at OpenAI.Assistants.InternalRunStepDeltaStepDetails.DeserializeInternalRunStepDeltaStepDetails(JsonElement element, ModelReaderWriterOptions options) at OpenAI.Assistants.InternalRunStepDeltaObjectDelta.DeserializeInternalRunStepDeltaObjectDelta(JsonElement element, ModelReaderWriterOptions options) at OpenAI.Assistants.InternalRunStepDelta.DeserializeInternalRunStepDelta(JsonElement element, ModelReaderWriterOptions options) at OpenAI.Assistants.RunStepDetailsUpdate.DeserializeRunStepDetailsUpdates(JsonElement element, StreamingUpdateReason updateKind, ModelReaderWriterOptions options) at OpenAI.Assistants.StreamingUpdate.FromEvent(SseItem1 sseItem) at OpenAI.Assistants.AsyncStreamingUpdateCollection.AsyncStreamingUpdateEnumerator.System.Collections.Generic.IAsyncEnumerator.MoveNextAsync() at Microsoft.SemanticKernel.Agents.OpenAI.Internal.AssistantThreadActions.InvokeStreamingAsync(OpenAIAssistantAgent agent, AssistantClient client, String threadId, IList1 messages, OpenAIAssistantInvocationOptions invocationOptions, ILogger logger, Kernel kernel, KernelArguments arguments, CancellationToken cancellationToken)+MoveNext() at Microsoft.SemanticKernel.Agents.OpenAI.Internal.AssistantThreadActions.InvokeStreamingAsync(OpenAIAssistantAgent agent, AssistantClient client, String threadId, IList1 messages, OpenAIAssistantInvocationOptions invocationOptions, ILogger logger, Kernel kernel, KernelArguments arguments, CancellationToken cancellationToken)+MoveNext() at Microsoft.SemanticKernel.Agents.OpenAI.Internal.AssistantThreadActions.InvokeStreamingAsync(OpenAIAssistantAgent agent, AssistantClient client, String threadId, IList1 messages, OpenAIAssistantInvocationOptions invocationOptions, ILogger logger, Kernel kernel, KernelArguments arguments, CancellationToken cancellationToken)+System.Threading.Tasks.Sources.IValueTaskSource.GetResult() at AiEngine.SemanticKernel.SemanticKernelService.GetChatMessageContentStreamingAssistantAsync(RequestModel requestModel, OpenAIAssistantAgent assistant, String threadId) in

[JP-droidic]

Even with code modifcation where vectore store is attached to a thread

    ```

OpenAIAssistantAgent agent =
await OpenAIAssistantAgent.CreateAsync(
kernel: new Kernel(),
GetClientProvider(),
new OpenAIAssistantDefinition(openAiOptions.ChatModelId)
{
Instructions = instructions,
Name = name,
EnableFileSearch = !string.IsNullOrEmpty(vectorStoreId),
EnableCodeInterpreter = enableCodeInterpreter
});

    return agent;

return await assistant.CreateThreadAsync(new OpenAIThreadCreationOptions()
{
VectorStoreId = setup.VectorStoreId
});

I can see in openAI:

![image](https://github.com/user-attachments/assets/602be13a-3cb9-465d-9c2e-e0da4e5f1c68)

[JP-droidic]

Sorry guys false alarm. Once we upgraded the library to 1.20 it started working.

I'm going to close this issue now