Laravel Internal Server Error on Centos Panel

hi, i have a 500 internal error with Laravel on centos 6 i gave permission to apache ,check picture here -> http://nimb.ws/pMS2Xm my server path is \home\MY_USERNAME\public_html\blog

No Laravel Log but on apache log i see this

SoftException in Application.cpp:249: File "/home/MY_USERNAME/public_html/blog/public/index.php" is writeable by group,

original htaccess on public folder here

<IfModule mod_rewrite.c>
    <IfModule mod_negotiation.c>
        Options -MultiViews -Indexes
    </IfModule>

    RewriteEngine On

    # Handle Authorization Header
    RewriteCond %{HTTP:Authorization} .
    RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]

    # Redirect Trailing Slashes If Not A Folder...
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteCond %{REQUEST_URI} (.+)/$
    RewriteRule ^ %1 [L,R=301]

    # Handle Front Controller...
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteRule ^ index.php [L]
</IfModule>

might be suphp problem, i'am still checking