Transaction Not Completed - after entering shipping details

The shop was working ok but it has just stopped and I haven't touched any of the code.

It is ok up until this page:
https://www.atleticobenidormcd.com/en/shop/checkout.php
but after entering the shipping details and clicking submit it goes directly to this page: https://www.atleticobenidormcd.com/en/shop/checkout_failure.php

Transaction Not Completed
We're sorry
Your transaction could not be completed. Please go to the shop and try again

I have sent the error code in the pm

The message from paypal is: "Account is restricted" error: 10002

This could be a problem with the account settings on paypal. I'd try contacting paypal support to see if they can provide more information. I found reference to the error here: https://www.paypal.com/us/smarthelp/article/why-did-i-get-api-error-code-10002-ts1030

and it says:

  10002: Restricted account - Account is restricted

These errors occur because the credentials are incorrect or invalid. Make sure they're entered correctly and, if possible, try again. For help resolving this issue or others, visit PayPal's Contact Customer Service page.