Connection to Metabase database not working with new questions

Hi there,

Whenever we try to create a new question to query the Metabase database, it fails when we try to visualize results. It happens both when going to the Visualization screen and when we use the preview option from the question creation UI. The error is the same: "The connection attempt failed".

But when we check the dashboards/questions already available through the Metabase Analytics folder, they work without issue. Any idea why is this not working?

Thanks.

Troubleshooting info? Logs ?