Does your server meet the specs on the right side of this page?
https://developers.oxwall.com/hosting
https://developers.oxwall.com/forum/topic/47677
Just remember that since you have unzipped the oxwall files now you will need to do that phpinfo in your config file. Oxwall is set up so that it will not run anything but its own files unless you tell it, but that is a different matter. Just do the second part of that process in that link i gave you and check your phpinfo
"[13-Nov-2016 17:22:35 UTC] PHP Fatal error: Call to undefined function mb_internal_encoding() in /home/devsite/public_html/ow_includes/init.php on line 35[13-Nov-2016 17:22:36 UTC] PHP Fatal error: Call to undefined function mb_internal_encoding() in /home/devsite/public_html/ow_includes/init.php on line 35[13-Nov-2016 17:22:45 UTC] PHP Fatal error: Call to undefined function mb_internal_encoding() in /home/devsite/public_html/ow_includes/init.php on line 35[13-Nov-2016 17:50:27 UTC] PHP Fatal error: Call to undefined function mb_internal_encoding() in /home/devsite/public_html/ow_includes/init.php on line 35[13-Nov-2016 18:32:05 UTC] PHP Fatal error: Call to undefined function mb_internal_encoding() in /home/devsite/public_html/ow_includes/init.php on line 35[13-Nov-2016 19:16:03 UTC] PHP Fatal error: Call to undefined function mb_internal_encoding() in /home/devsite/public_html/ow_includes/init.php on line 35[13-Nov-2016 19:16:05 UTC] PHP Fatal error: Call to undefined function mb_internal_encoding() in /home/devsite/public_html/ow_includes/init.php on line 35[14-Nov-2016 10:33:10 UTC] PHP Fatal error: Call to undefined function mb_internal_encoding() in /home/devsite/public_html/ow_includes/init.php on line 35[14-Nov-2016 10:33:10 UTC] PHP Fatal error: Call to undefined function mb_internal_encoding() in /home/devsite/public_html/ow_includes/init.php on line 35"