Provisioning Profile Rule - HTTPS not working

We attempted to use HTTPS to serve a provisioning file, but were receiving this in the System Log (4.4.2):

<Wed May 29 14:00:09 2019> provision[16350]: failed to connect provisioning.all...
<Wed May 29 14:00:09 2019> provision[16350]: HTTPS get configuration file failed
<Wed May 29 14:00:09 2019> provision[16350]: Update configuration fialed , retry 60 s later
<Wed May 29 14:00:09 2019> provision[16350]: start to check command file

Once we switched to HTTP it worked fine. The Help blurb (see image) shows it can do HTTPS. We believe we have a valid certificate if that is one of the prerequisites.

Just an FYI so that the help text can be corrected, or if anyone has used HTTPS successfully what was the secret? We did try to SSH into the unit, and found that wget doesn't support HTTPS when trying to get the file.