Currently, we still have an on-going issue where QuickBooks Online users experience connection issue with Wells Fargo.
As a workaround, you may want to consider manually uploading your bank transaction to QuickBooks Online via Web Connect. Please keep in mind that it will most likely cause duplicates once the issue gets resolved where you need to exclude those duplicates.
Also, I suggest contacting our QuickBooks Customer Care so they can add your account to the list of affected users. This way, you'll receive an email regarding the issue once updates become available.
If you have any other concerns, feel free to leave a comment below.