I just got approved for PayPal Advanced Payments and put all of the required settings into my Magento CE 18.104.22.168 installation. However, during the checkout process, when I press the Order button, the area where the iframe should show up shows the error message: “HTTP Error 400 - Bad request”.
The order shows up on the Orders page pending payment approval.
What could be wrong here? I feel like I’ve tried everything.
All of the settings are correct. I have AVS and CSC set to No, with Enable Secure Token set to Yes.
The PayPal Payments Advanced credentials are correct.
I’ve tried disabling the SSL verification.