Hi there, @Dollface! So glad you reached out and let us know about this. Welcome to the Seller Community! We are happy to have you here.
Are you by any chance using an API connection with Square? Usually the Invalid Request message appears when there is a issue linking an API network with Square's. If not, there may be an issue in relation to your WiFi Network or Online Browser.
When you have a moment, would you mind walking through these troubleshooting steps? They should be able to get you back up and running.
Let me know if that works! I will keep an eye out for your reply.
Joe
Community Moderator, Square
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