Using Magento 2.2.1 freshly installed
I use php 7.1.1
I am using Adyen payment gateway https://github.com/Adyen/adyen-magento2 the extension developer says its not due to their extension. I have enabled every php extension on server side thats needed. So now it comes to magento 2
Tried to checkout as guest and then I see
Failed to load resource: the server responded with a status of 500 (Internal Server Error)
https://{siteurl.com}/rest/default/V1/guest-carts/1a41b8daeba4d90df7c5dca2085dd732/payment-information
When I try to use COD or Check the checkout process is smooth. Haven't tried with paypal or others
**Can you please help ??
If you need me to perform any steps in either server side or magento 2 please tell me the steps on what to do I will post the output here**