I ran into an issue with HTTP/2 a while ago, and each version I cannot seem to fix it.
http://serverfault.com/questions/747997/http-2-returning-weird-symbols

Running on the latest version (1.9.12) has the same issue, and FireFox simply does not get a response, and Safari gives this: https://i.imgur.com/pXbF9uA.png

The website is https://xenogamers.com if anyone is able to get a response on these browsers.

Works for me with FF.