InDesign Script being blocked by Network Threat Protection

I'm currently in the trial evaluating Cloud for our company, and I'm having an issue with an InDesign Script that we created.

Essentially the script does the following:

1. Gets some identifier info from the document - Works
2. Connects to a web server in our network - Works
3. Requests a php page using a query string unique to the document - Works
4. Tries to read configuration info for the document from the web page response - Dies
5. Runs the configuration info - N/A

The response from the webserver in step 4 is literally just a text string, nothing else. No header, footer, any HTML formatting; just a text string.

Whenever the script runs, it just returns an empty set.

I've tried adding exclusions for everything in the Cloud control panel, but nothing makes any difference.

I've also disabled everything from the client, and that does nothing either. The only thing that allows the script to run, is disabling the Network Threat Protection service.

Also strange, I've enabled Debug logging for the NTP service, and there is absolutely no information about this script even running, like it never happened in the first place.

Anyone have any ideas on how to resolve this?