I am getting this same error for First Republic Bank - Corporate Online. I have tried incognito without success. The feed worked fine until about 10 days ago. We recently connected the security token. QBO still synced fine for about a week with a daily token verification. Now, it does not sync. I have also removed the connection and tried to reconnect. No luck! I can login at the bank website just fine.
https://www.frcorporateonline.com/wcmfd/wcmpw/CustomerLogin