I am using the PayPal sandbox to make test payments. It was working fine since last 3-4 months. But I see that they are making changes in sandbox design, ways to manage test email accounts, etc.
They have disabled my actual sandbox account and asks me to login using real PayPal account. So I created a new sandbox (https://developer.paypal.com/) account using my PayPal account. I imported test emails from my old sandbox account, and started making test payments. But it didn't work. I deleted all my imported test emails, and created some new test emails. But it also didn't work.
I am logged into the sandbox account, try to make a test payment. But it shows me this message everytime.
I am not getting what's the issue. Need help please.
Thanks in advance.