Hi, I have phasing the issues when we use real card for payment on production and getting this error, We have check the dashboard and developer account but when we click on activate account link (Sign up for Square). it redirect on above URL and after load the URL it will redirect on dashboard, please check what is the issues and how we can fix this. if you need anything from us for checking please tell us.
inside the dashboard when we click MAKE A PAYMENT link its also redirect on dashboard.
When we go to the developer dashboard we see this message and click on this link its open a URL as mention in above and automatic redirect on square dashboard please check the attachment and fix the issues.