Mac OS X Server "/.well-known/acme-challenge/***KEY***" Error

I know that this is how letsencrypt verifies that I own the server, however when I make the required file for this URL and navigate to it this is what OS X Server produces:

Websites are turned off.
An administrator can turn them on using the Server application.

The website is on and working. Does anybody know how I can fix this issue? Any help is greatly appreciated.

I'm not sure, but I wonder if this prior issue is related to your problem:

Actually I found a solution to my problem just a few minutes ago here:

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