microsoft/semantic-kernel · error · NotSupportedException

AI service '{config.AIChatService}' is not supported.

Error message

AI service '{config.AIChatService}' is not supported.

What it means

Error "AI service '{config.AIChatService}' is not supported." thrown in microsoft/semantic-kernel.

Source

Thrown at dotnet/samples/Demos/AgentFrameworkWithAspire/ChatWithAgent.AppHost/Extensions/ResourceBuilderExtensions.cs:43

        builder.WithEnvironment(nameof(config.AIChatService), config.AIChatService);

        switch (config.AIChatService)
        {
            case AzureOpenAIChatConfig.ConfigSectionName:
            {
                builder.WithEnvironment($"{HostConfig.AIServicesSectionName}__{nameof(config.AzureOpenAIChat)}__{nameof(config.AzureOpenAIChat.DeploymentName)}", config.AzureOpenAIChat.DeploymentName);
                builder.WithEnvironment($"{HostConfig.AIServicesSectionName}__{nameof(config.AzureOpenAIChat)}__{nameof(config.AzureOpenAIChat.ModelName)}", config.AzureOpenAIChat.ModelName);
                break;
            }

            case OpenAIChatConfig.ConfigSectionName:
            {
                builder.WithEnvironment($"{HostConfig.AIServicesSectionName}__{nameof(config.OpenAIChat)}__{nameof(config.OpenAIChat.ModelName)}", config.OpenAIChat.ModelName);
                break;
            }

            default:
                throw new NotSupportedException($"AI service '{config.AIChatService}' is not supported.");
        }

        // Add RAG configuration to the environment variables so that Api Service can access it.
        builder.WithEnvironment($"{nameof(config.Rag)}__{nameof(config.Rag.AIEmbeddingService)}", config.Rag.AIEmbeddingService);
        builder.WithEnvironment($"{nameof(config.Rag)}__{nameof(config.Rag.VectorStoreType)}", config.Rag.VectorStoreType);
        builder.WithEnvironment($"{nameof(config.Rag)}__{nameof(config.Rag.CollectionName)}", config.Rag.CollectionName);

        switch (config.Rag.AIEmbeddingService)
        {
            case AzureOpenAIEmbeddingsConfig.ConfigSectionName:
            {
                builder.WithEnvironment($"{HostConfig.AIServicesSectionName}__{nameof(config.AzureOpenAIEmbeddings)}__{nameof(config.AzureOpenAIEmbeddings.DeploymentName)}", config.AzureOpenAIEmbeddings.DeploymentName);
                builder.WithEnvironment($"{HostConfig.AIServicesSectionName}__{nameof(config.AzureOpenAIEmbeddings)}__{nameof(config.AzureOpenAIEmbeddings.ModelName)}", config.AzureOpenAIEmbeddings.ModelName);
                break;
            }

            case OpenAIEmbeddingsConfig.ConfigSectionName:
            {

View on GitHub (pinned to c028a0c7dc)

Solutions

1. Configure AIChatService with a supported service name in the AppHost configuration.
2. Review ResourceBuilderExtensions.cs for the supported AI service types and update the configuration value.

When it happens

Trigger: Thrown at dotnet/samples/Demos/AgentFrameworkWithAspire/ChatWithAgent.AppHost/Extensions/ResourceBuilderExtensions.cs:43 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of microsoft/semantic-kernel@c028a0c7dc (2026-08-13). Data as JSON: /api/errors/d538d2f59ee9689e. Report an issue: GitHub.