Maybe try disabling FTP at Global Configuration -> Server.

You may have a file ownership issue rather than a file permission issue. Changing to appropriate PHP file handler can sometimes help.

There is a more complete answer at: Recommended practices regarding Joomla file/directory permissions and ownership on linux systems?

Maybe try disabling FTP at Global Configuration -> Server.

You may have a file ownership issue rather than a file permission issue. Changing to appropriate PHP file handler can sometimes help.

There is a more complete answer at: Recommended practices regarding Joomla file/directory permissions and ownership on linux systems?