.Net: Bug: Microsoft.SemanticKernel.Connectors.OpenAI.OpenAIChatMessageContent - A class should either have a default constructor, one constructor with arguments or a constructor marked with the JsonConstructor attribute.

[MavhengeleMpho]

We are using Microsoft.SemanticKernel.Connectors.OpenAI.OpenAIChatMessageContent for our chatHistory, it works fine when saving history as strings, the challenge comes when we try to save messages from AuthorRole tool and when there is toolCalls involved, this happens when we use the plugin to get data from the apis/ database, we are able to save messages from other AuthorRoles its the Tool AuthorRole that introduces issues, and the tool authorRoles are added outside of our codebase, initially we where removing the messages in the chathistory with tool authorRole but now we must put them back since we starting to work towards building agents calling other agents to avoid loosing context we put the tool messages back in but we get the below error:

System.AggregateException
HResult=0x80131500
Message=One or more errors occurred. (Something went wrong when loading state: Unable to find a constructor to use for type Microsoft.SemanticKernel.Connectors.OpenAI.OpenAIChatMessageContent. A class should either have a default constructor, one constructor with arguments or a constructor marked with the JsonConstructor attribute. Path '**************************.$values[1].ToolCalls'.)
Source=System.Private.CoreLib
StackTrace:
at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)
at System.Threading.Tasks.Task1.GetResultCore(Boolean waitCompletionNotification) at Microsoft.Teams.AI.State.TurnState.<LoadStateAsync>d__26.MoveNext() at Microsoft.Teams.AI.Application1.<_OnTurnAsync>d__66.MoveNext()
at Microsoft.Teams.AI.Application1.<OnTurnAsync>d__63.MoveNext() at Microsoft.Bot.Builder.MiddlewareSet.<ReceiveActivityWithStatusAsync>d__3.MoveNext() at Microsoft.Bot.Builder.BotAdapter.<RunPipelineAsync>d__23.MoveNext() at Microsoft.Bot.Builder.BotAdapter.<RunPipelineAsync>d__23.MoveNext() at Microsoft.Bot.Builder.CloudAdapterBase.<ProcessActivityAsync>d__22.MoveNext() at Microsoft.Bot.Builder.CloudAdapterBase.<ProcessActivityAsync>d__21.MoveNext() at Microsoft.Bot.Builder.Integration.AspNet.Core.CloudAdapter.<ProcessAsync>d__4.MoveNext() .Controllers.BotController.<PostAsync>d__5.MoveNext() in D:\SourceControl\2025\\Controllers\BotController.cs:line 41 at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.TaskResultExecutor.<Execute>d__0.MoveNext() at System.Runtime.CompilerServices.ValueTaskAwaiter1.GetResult()
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<g__Logged|12_1>d.MoveNext()
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<g__Awaited|10_0>d.MoveNext()

This exception was originally thrown at this call stack:
[External Code]

Inner Exception 1:
TeamsAIException: Something went wrong when loading state: Unable to find a constructor to use for type Microsoft.SemanticKernel.Connectors.OpenAI.OpenAIChatMessageContent. A class should either have a default constructor, one constructor with arguments or a constructor marked with the JsonConstructor attribute. Path 'adfd964c-955f-48dd-afcc-dddf578af169.$values[1].ToolCalls'.

Inner Exception 2:
JsonSerializationException: Unable to find a constructor to use for type Microsoft.SemanticKernel.Connectors.OpenAI.OpenAIChatMessageContent. A class should either have a default constructor, one constructor with arguments or a constructor marked with the JsonConstructor attribute. Path 'adfd964c-955f-48dd-afcc-dddf578af169.$values[1].ToolCalls'.

To Reproduce
Just have toolCalls from Kernel Functions in your chatHistory

Expected behavior
It must serialize and deserialize the chatHistory, be able to keep it in AppState and not break

Screenshots
Screenshot is attached.

Platform

• Language: C#, API
• Source: Microsoft.SemanticKernel.Abstractions" Version="1.47.0" and
  Microsoft.SemanticKernel" Version="1.47.0"
• AI model: OpenAI:GPT-4o
• IDE: Visual Studio
• OS: . Windows

Additional context
All we are trying to do is, save the messages objects and metadata from the AuthorRole tool to the chatHistory same as we also save user and assistant messages to the chatHistory and be able to load them back From AppState ->Conversation State->chatHistory and use them again when sending the messages back to the GPT fro context.