You can investigate the reason for such an error from the "API debug log" by following the below steps:
- Navigating to the Developer’s menu > Testing > API Debug Logs (within your desired profile).
- Then you can navigate to the request payload sent from your side from the icon ? (view request body) in the API debug logs.
Or you may get the error directly from the response payload sent from PayTabs according to your sent request
The cart_description format MUST be string