I'm getting error code 1175 and can't connect barclays account ?

Welcome to the Community, userbillrowland18.

The error you're seeing can be caused by a browser-related issue. We can troubleshoot that by opening the company file using the a private or incognito mode. Here are the shortcut keys for each browser:

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

Once the private window opens, go to the Banking page and connect your Barclays account.

If you're able to connect it successfully, you'll want to switch back to the main browser and clear the cache. Doing so can refresh the system and removes browsing data. If the issue persists, you can use other supported browser to isolate the error. 

In the meantime, you can consider downloading and uploading your transactions manually so you can keep them tracked. You'll just have to download your transactions directly from your bank's website first. Once done, here how you can upload your transactions:

1. Go to Banking.
2. Under Bank and Credit Cards, select your HSBC Business Bank account.
3. On the Update menu, select File upload.
4. Find and open your downloaded bank transactions.
5. Select Upload.
6. Click Finish.

In addition, here's an article you can read to learn more about how you can manually upload your transactions: Manually Upload Transactions into QuickBooks Online.

 I've also included this helpful article that'll help you handle your bank transactions after uploading them: Download, Match, and Categorise your Bank Transactions in QuickBooks Online.

Feel free to get back to me if you have other questions. Leave a comment below, and I'll be sure to take care of it.