Failed with 500 Internal Server Error - Payment Gateway Checkout.com

[lamontenid]

Hi, I tried to simulate payment to my website. I used checkout.com as my payment gateway and enabled the test mode before simulating a purchase. I used test card as well provided by checkout.com. Now after I tried making a purchase, I got the message "Failed with 500 Internal Server Error".

[Checkout]

Hi @lamontenid 
This is because of a configuration change required for Shopify's onsite solution.

Can you please reach out to support@checkout.com including your sandbox account details?