Magento – Downloader error: Invalid file permissions, could not save configuration

by c

If you see

Invalid file permissions, could not save configuration

in Magento’s downloader, usually when making changes to Settings such as Preferred state, make sure this file:

(magento root)/downloader/config.ini

is writeable by the webserver. If you don’t know how to do this properly,

chmod 777 (magento root)/downloader/config.ini

should fix your problems.