Assalamualaikum
Sister and brother
our beloved pkp team @asmecher
i just try updating the copied version of my company jurnal and there was error on loading css .etc OJS-2471 → OJS-3000
on error log i found this
[26-Sep-2016 16:09:07 Asia/Jakarta] PHP Warning: readfile() has been disabled for security reasons in /home/-----/public_html/ojs3/lib/pkp/controllers/page/PageHandler.inc.php on line 175
[29-Sep-2016 11:13:44 Asia/Jakarta] PHP Warning: readfile() has been disabled for security reasons in /home/-----/public_html/ojs3/lib/pkp/controllers/page/PageHandler.inc.php on line 175
[29-Sep-2016 15:35:46 Asia/Jakarta] PHP Warning: readfile() has been disabled for security reasons in /home/-----/public_html/ojs3/lib/pkp/controllers/page/PageHandler.inc.php on line 175
after surf all around the net i found some article that could be some reference for the developer team
if-your-server-sets-the-allow_url_fopen-and-allow_url_include-php-directives-off
sorry if i am wrong, i just try to help