Blank page after runing setup.php

i am trying to install openemr, but after setup finishes i get a blank page, not a login page. I changed the default language not to be english and changed the logo. If i try with these changes i cant install it. If i install it as default without any changes it will work just fine. If i install it as default and then do the changes it will also work just fine. Is there any way to fix that? What am i doing wrong? Also where can i find how to create new users? Thanks!!