HSBC have informed us that they have identified the problem and a fix is due by the end of tomorrow (21/01/2020).
The error occurrence is intermittent so if you have any customer who have connected an HSBC account today (20/01/2020) and no data was available at the time, the data may be available now following a subsequent refresh/retry. If the data is not available, it means HSBC are still returning this error.
We will continue to monitor who this is impacting. If you have any questions please get in submit a ticket via https://openwrks.zendesk.com