Barclays doesn't connect

Welcome to the Community, balazsnagy,

I appreciate you posting your concern here, and I'm willing to help. Before doing so, can you tell me more details about the issue? What specific error code did you receive? Adding screenshots will be a great help as well. Any type of information will do. It's for us to provide you with the most accurate solution.

In the meantime, I recommend checking your bank's website or contacting them for possible issues on their end that prevent you from connecting to QuickBooks Online (QBO).

If everything is fine on their end, I suggest opening a different browser or a private window to isolate the issue. Here's how to activate incognito mode in some of the most common online browsers:
 

• Google Chrome: Ctrl + Shift + N
• Mozilla Firefox: Ctrl + Shift + P
• Microsoft Edge: Ctrl + Shift + P
• Safari: Command + Option + P

If you can finally connect your Barclay account to QBO, it's safe to say that the browser has caused it. This can be fixed by clearing your cache and cookies.

Additionally, I'll also include this article you can read if you want to learn how to fix Open Banking errors in QBO: Open Banking connection errors in QuickBooks Online.

I'm looking forward to this issue getting resolved. Don't hesitate to leave a reply if you require further assistance with connecting your bank account in QBO. The Community team is here to help you anytime. Keep safe!