lfnovo/open-notebook · error · ConfigurationError

No model configured for {selection_reason}. Please go to Set

Error message

No model configured for {selection_reason}. Please go to Settings → Models and configure a default model for '{default_type}'.

What it means

provision_langchain_model() resolves a model by id or default_type and found none — no LanguageModel row matches. It means the requested default model slot (e.g. 'language' or a specific override) is unconfigured or points to a deleted model, so no LLM can be provisioned for the AI call.

Source

Thrown at open_notebook/ai/provision.py:45

        )
        model = await model_manager.get_default_model("large_context", **kwargs)
    elif model_id:
        selection_reason = f"explicit model_id={model_id}"
        model = await model_manager.get_model(model_id, **kwargs)
    else:
        selection_reason = f"default for type={default_type}"
        model = await model_manager.get_default_model(default_type, **kwargs)

    logger.debug(f"Using model: {model}")

    if model is None:
        logger.error(
            f"Model provisioning failed: No model found. "
            f"Selection reason: {selection_reason}. "
            f"model_id={model_id}, default_type={default_type}. "
            f"Please check Settings → Models and ensure a default model is configured for '{default_type}'."
        )
        raise ConfigurationError(
            f"No model configured for {selection_reason}. "
            f"Please go to Settings → Models and configure a default model for '{default_type}'."
        )

    if not isinstance(model, LanguageModel):
        logger.error(
            f"Model type mismatch: Expected LanguageModel but got {type(model).__name__}. "
            f"Selection reason: {selection_reason}. "
            f"model_id={model_id}, default_type={default_type}."
        )
        raise ConfigurationError(
            f"Model is not a LanguageModel: {model}. "
            f"Please check that the model configured for '{default_type}' is a language model, not an embedding or speech model."
        )

    return model.to_langchain()

View on GitHub (pinned to a7de90d38a)

Solutions

1. Go to Settings → Models and set a default language model for the '{default_type}' slot
2. If a default is set but stale, re-select a valid model (the referenced id may have been deleted)
3. Verify the model's provider has valid API credentials so it appears as available

from open_notebook.ai.models import model_manager
m = await model_manager.get_default_model('language')
if m is None:
    raise HTTPException(409, 'Configure a default language model in Settings → Models')

try:
    model = await provision_langchain_model(...)
except ConfigurationError as e:
    return JSONResponse(status_code=409, content={'detail': str(e), 'hint': 'Settings → Models'})

When it happens

Trigger: Calling any chat/answer endpoint (provide_answer, call_model, write_final_answer, content_process) when Settings → Models has no default language model set, or when the configured default model id was deleted from the database while still referenced.

Common situations: Fresh setup where the user imported content but never configured models; a model was deleted via the Models settings page leaving a dangling default_model id; multi-provider setups where the default points at a provider whose credentials were removed.

Related errors

• Model is not a LanguageModel: {model}. Please check that the
• Failed to load default models configuration
• Error fetching models: {str(e)}
• Invalid model type. Must be one of: {valid_types}
• Model '{model_data.name}' already exists for provider '{mode

AI-assisted analysis of lfnovo/open-notebook@a7de90d38a (2026-08-27). Data as JSON: /api/errors/55a59dde1889f45a. Report an issue: GitHub.