I cannot connect my Quickbooks online to FNB to update transactions. Keep getting error 105 Please assist.

We understand the importance of managing your transactions in our program. However, in this case, we have an ongoing investigation into the exact error message you've stated. Our engineer is currently working on it, and we appreciate your patience as we investigate this further. 

For now, I'd recommend contacting our QuickBooks Support Team so that they can add you to the list of affected users and get notified via email when there's an update.

Here's how:

1. Click the Help (?) icon.
2. On the Assistant tab, enter Talk to a human.
3. Enter a short description of your concern and press Enter.
4. Select Contact Us to connect with a live support agent.
5. Choose how you'll want to get in touch with the support.

• Start a chat with a support expert.
• Get a callback from the next available expert.

You may also check the support hours to know when agents are available. This way, you can contact them at a time that is convenient for you. See this article for details: Contact QuickBooks Online support.

Moreover, you can visit these articles for more fixes in managing bank errors and categorising transactions in QBO:

• Troubleshoot and fix banking errors
• Categorise and match online bank transactions in QuickBooks Online

Don't hesitate to post again in the comment section if you have bank concerns or any QuickBooks-related issues. We'll be around to help you, mike. Take care always!