Hello and welcome to the Community, @miles6.
We are aware of this connectivity issue that you're currently experiencing when connecting to HSBC. I'd recommend attempting to connect or re-authenticate again to resolve. However, if you get the 590 error after trying, you'll need to contact our Online Support so they can add you to the list of affected users.
In the meantime, you can manually download your transactions by signing in to your bank's website. Your bank may give you the option to export your transactions via CSV.
Please bear with us while our Engineers are working to identify the cause and resolve the issue.
If you need anything else, you can leave a comment below. I'm here to help however I can.