We have identified an issue where the Q1500US is only returning 1 asset today. As a result, Pipelines using the Q1500US today will have abnormal behavior. As a downstream effect, the risk model is also unavailable for today. Backtests and research notebooks that use the risk model through today will raise an exception.
We will post back here with updates as we get them. You can also check on the status of the issue on our status page.