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I've successfully passed the payment details to sandbox paypal and loaded the login page. Once I put my sandbox login information, it says "System error" and have the button "Try again" but it never success. Any idea what's wrong?
I'm having all kinds of weird sandbox problems today. Even when I'm already logged in, when I go from my test site purchase to paypal sandbox, I can see it flashing the login screen even though I'm logged in already. And when I hit "pay now", it reloads the page and comes back to the same screen with no messages. I can see in the browser console log that there's a 400 (bad request) on a sandbox createpayment URL.
