How to return a successful response after a Qualtrics Action Post

I have made an 'Action' that posts whenever a survey is submitted to an AWS server passing the Survey ID and Response ID in a 'POST' so I can then do a 'GET' to retrieve the full survey response. I am following the HttpRequest server as demonstrated here:

https://api.qualtrics.com/docs/listen-to-and-retrieve-responses-in-real-time

Everything is working correctly, and I can successfully do the GET, the only problem is that the 'Action' is not getting a successful response from the server so the 'POST' is logging as 'Failed' and making multiple retries over 2.5 minutes with the following 'Task Output':

{
"needRetry": true,
"name": "TaskHandlerError",
"message": "Error: socket hang up"
}

I have tried returning a response of '200 - OK' in several ways, but none seem to work, including a 'self.send_response(200)' in the 'do_POST' function. Any documentation or ideas on how to get Qualtrics to receive a successful 'POST" response in Python?