I was looking at the document Ports used on your PBX on the Wiki and it shows that port 84 is used for HTTP provisioning when I think it’s supposed to be 83.
The default port for http provisioning has been applied inconsistently in the past. Depending on which distro you’ve installed and when it could be 83 or 84. A new install with 13 or 14 now uses 84.
edit - clarifcation added to wiki page.
Thanks for the clarification!