Comfy-Org/ComfyUI · error · Exception

Expected JSON response to validate into a Pydantic model, go

Error message

Expected JSON response to validate into a Pydantic model, got non-JSON (binary or text).

What it means

Error "Expected JSON response to validate into a Pydantic model, got non-JSON (binary or text)." thrown in Comfy-Org/ComfyUI.

Source

Thrown at comfy_api_nodes/util/client.py:164

        final_label_on_success=final_label_on_success,
        progress_origin_ts=progress_origin_ts,
        monitor_progress=monitor_progress,
        max_retries_on_rate_limit=max_retries_on_rate_limit,
        is_rate_limited=is_rate_limited,
    )
    if not isinstance(raw, dict):
        raise Exception("Expected JSON response to validate into a Pydantic model, got non-JSON (binary or text).")
    return _validate_or_raise(response_model, raw)

View on GitHub (pinned to 1c6d8d45b3)

Solutions

1. Retry the request; the endpoint returned a non-JSON response.

When it happens

Trigger: Thrown at comfy_api_nodes/util/client.py:164 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of Comfy-Org/ComfyUI@1c6d8d45b3 (2026-08-14). Data as JSON: /api/errors/2e61baadd1561888. Report an issue: GitHub.