If the issue still occurs after trying these steps, I'd suggest reaching out to our Phone Representatives. They have the necessary tools to pull up your account and can check with our Banking team to verify what's causing the issue.
As a workaround, you can download your transactions using the WebConnect. This allows you to manually upload bank transactions in QuickBooks Online. For the steps of performing this process, please refer to this article: How to upload more than 90 days of bank transactions.
There you go, @cflores2006. You'll be back up and running in no time. Please let me know if you have any other questions. Take care!