1. For Error with "response_code": 401, "response_message": "app not found"
The reason for such an error :
Please note, you are using an incorrect end point URL
The resolution:
Please refer the shared Technical Document and use the correct URL for the respective product.
Incase of any further assistance, we request you to create a ticket.
2. For Error with "response_code": 404, "response_message": "not found"
The reason for such an error : If the URL is having extra spacing at the start or end
The resolution: Remove the extra spacing from the URL