They just posted ver. 4.1.3.1 with a fix 😉
Same here: Tried to install “portfolio theme” on a freshWP 3.0.l with no plug ins installed. Cannot activate this theme because of this. Have to remove it via ftp.
Login to your server with SSH, or get console access in some other way.
chmod 777 /var/www/html/wordpress/wp-content/plugins
This all has to do with the permissions your ftp-user have to these directories.
Maybe you could change the owner group instead, and its rights, talk tp an engineer 😉
