From here, choose the “Integration Request” at the top of the box that appears at the right. The integration request configures the mapping for our DELETE method. When you choose this option, you will see a screen similar to following:
The key item to note on this screen is the “Endpoint URL”. It turns out, our endpoint URL is missing a key qualifier. Select the pencil next to the Endpoint URL to edit the value. Append the /{id} to your endpoint and select the checkmark to save the value. This should have repaired the last broken piece of the puzzle.