Hello there, @tcinema. I'm here to share an update about being unable to do a local backup with QuickBooks Online (QBO).

I recognize the importance and urgency of resolving this problem. That's why I'd like to inform you that the investigation mentioned by my colleague above is still ongoing. Also, our engineering team is already working on a fix for the error you're encountering.

I also recommend reaching out to our QuickBooks Online Support so you'll be added as one of the affected users. This includes the support hours, so you'll know when agents are available. Once any updates are available, rest assured you'll be notified. 

Additionally, you can manually download the data out of QuickBooks. Then, save them on your local hard drive. If you're ready, you can follow this article to guide you through the process: Export reports, lists, and other data from QuickBooks Online.

Your patience and understanding in this situation are much appreciated. Please let me know if you have other concerns besides being unable to do a local backup in QBO. Take good care!