QB will not connect to online banking. Saying there is an errore

Hello, ron63. 

I'd like to ask what error did you encounter when connecting your bank account in QuickBooks Online? 

In the meantime, let's try to reconnect your bank account directly to your bank website. Please follow these steps below: 

1. Go to your bank's website and enter your credentials.
2. Copy the bank URL.
3. Go to your QBO's banking page, then select Add Account.
4. Paste your bank's online banking URL, press enter and try connecting again.    

Once connected, QuickBooks will automatically download your most recent transactions. After that, I recommend editing, assigning, and categorizing your transactions. Also, you can match them to the existing entries in the software. Just go to the For Review tab from the Banking menu. Doing so will help you ensure the accuracy of your financial records. 

You're always welcome to post here in the Community if you have other queries. I'll be sure to take care of it. Stay safe!