I followed the installation instructions for the Skin:
https://www.mediawiki.org/wiki/Skin:Minerva_Neue
and the extension, https://www.mediawiki.org/wiki/Extension:MobileFrontend:
I tried manually installing both the 1.35 and 'latest' versions for both skin and extension, including modifying the LocalSettings.php to include the wfLoadSkin/Extension lines.
When i tried accessing the wiki using the local IP, or via a reverse proxy (which otherwise works when i comment out the wfLoad lines) i get a 500 error in chrome and firefox.
LocalSettings.php looks like: