Fix NewConnectionError

✅ Solution

NewConnectionError in Celery usually arises from the broker (e.g., RabbitMQ, Redis) being unavailable or unreachable during Celery's attempts to establish a connection. To fix this, ensure your broker is running and accessible by Celery workers, and configure retry mechanisms with appropriate backoff strategies within your Celery settings to handle intermittent network issues or broker unavailability. Increasing the `broker_transport_options` retry parameters, such as `max_retries` and `interval_start`, can help.