Shut down restart it all devices and the same error occurs on all of them with multiple accounts. This is a feature or function that is done several times a day when we're busy but this is the first time today. Any data trying to be added or removed to a customer account obtains the same error message.  Unknown error an unknown error occurred please try again later.

 I'm able to look up transactions for today or any other day and process transactions.  Is this an error with Square?  I'm using the COTS and no customize software.