500 Error: File is writable by group
On occasion you may get a 500 page error (a blue/green error) when trying to run a PHP file in your account. When checking the error log which you can do via the cPanel account log in you may see the following line:[Sat Aug 12 00:57:37 2017] [error] [client 103.240.34.54] SoftException in Application.cpp:668: Directory "/home/username/public_html/index.php" is writeable by groupThis is due to the server running SuPHP and the files having higher permissions than allowed,
How to solve this issue
Fix this problem you need to make sure your files are chmod 644 for all PHP based files and 755 for directories in order for them to work with SuPHP. You can easily do this by connecting via FTP with Filezilla Not from Cpanel and right clicking on the problem folders and files and selecting file permissions. Also set 0755 permission on public_html directory.