You can change your own directory permissions using the file
manager.
Find and choose the file you wish to change permissions for using the file manager in your control panel. Select/highlight the file and use the "Change Permissions" option at the top of the file manager.
Please
ensure that files/directories never have 777 as it may result in an
Internal Server Error.
Please ensure that all PHP directories should have 755 permissions and files should have 644 permissions.