Cpanel and PHP error 500

Sometimes its not possible to see what are the error that return error 500 in php, especially with wordpress.

One way to check all php error are here:
/usr/local/apache/logs/error_log

Found one common problem lately was that the /home/username/ directory became writable by group which return the error 500.

changing the permission solve the issue

sudo chmod og-w /home/username/