Web Deploy suddenly failing despite no pubxml changes in a year

Simple question hopefully:
I am deploying an asp.net mvc core site that’s routed through Cloudflare. In the pubxml, I have the url as https://:8172/msdeploy.axd?site=

This previously worked, and there haven’t been any changes to where the site is hosted, or anything like that. Now however, I’m getting the following exception:

Could not complete the request to remote agent URL ‘’. The underlying connection was closed: An unexpected error occurred on a send.

I’m wondering if this is something that’s related to Cloudflare, and how to resolve this issue (or where even the logs for this are in Visual Studio, which might be helpful).

Any help would be appreciated, thank you!

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