Unable to link my Barclay's business account with QuickBooks. Error QBA28

Thanks for visiting the Community, @userconstructionssuk.

Our engineers are already aware of this connectivity error. Rest assured, they're doing everything possible to get this working again as soon as possible.

I recommend contacting our Customer Care Support so you'll be added to the list of affected users. This way, you'll receive updates via email as progress is made towards a solution. Here's how to reach out:

1. In your QBO account, hover towards the (?) Help menu at the top.
2. Select Contact Us at the bottom. 
3. Enter a brief description about the issue. Then, hit Let's talk.
4. Click the Get the number button. Type your personal information.
5. Snap the Get the number button.

After typing your information, one of our phone specialists will contact you. Meanwhile, you can download your bank transactions manually via WebConnect. Please check out this link for the detailed steps.

I'm always here if you have questions or concerns. Just leave them in the reply section below. I'm happy to answer to answer them for you. Cheers!