I agree Rick. This should never have happened without Repay providing a solution for their API well in advance. And it's extremely frustrating that it has taken almost two days for them to admit the error.

A work around for now could be to log in to your portal through the browser and process customer transactions in the Virtual Terminal. I know it's not ideal in that you will have to double enter transactions to record in Adagio, but who knows how long this will take to fix.