Ok, this is the missing error message.
And Now a better explanation. What did you enter in your browser, what is the name of the file, where did you store it etc.pp.
P.S. According to the error message, you are running a Unix(!) system (not OSX) and the IP of your Server is a public IP (not a LAN IP) and it is 18.104.22.168. All in all i think, that you either entered the wrong hostname (domain name) or your Xampp does not run.
P.P.S.: I can open your Xampp Installation on 22.214.171.124!!! You should not run Xampp online, especially not as you obviously have no skills about Apache Servers.