permissions for _every file_ under public_html should be
-rw-rw-r--
permissions for _every dir_ under public_html and public_html should be
drwxrwsr-x
ownership for both files and directory should be either
www:user
or
user:user
where user is the specific users name.
In /html/res/ is shuld be
-rw-r--r--
and owned by
www:users
(and I mean 'users')