American Express Online Banking Sync Broken

I am bookkeeper using QuickBooks Online Accountant for all my clients.  As of this afternoon everyone’s Bank Transactions sync appears to be broken for all American Express cards.  I am getting the message “Unable to get transactions for “x” accounts.”  It is citing Error 324 and the fix now button doesn’t take you anywhere.  I do not see this reported anywhere.  Is this a known issue?  Is there an eta on a resolution