my server some web 500 internal Server Error but not show error log i don't know why
i use Joomla 3.5.1
joomla 2.5 work
apache error log
SoftException in Application.cpp:567: Directory "/home/mbanida/conference/2017" is writeable by group
Premature end of script headers: index.php
use
find . -type d -exec chmod -R 755 {} \;
find . -type f -exec chmod -R 644 {} \;
work for fix
Maybe you're looking in the wrong log try /usr/local/apache/logs