WordPress update – Installation Failed

Hello there,

I’m trying to update WordPress for a client from the dashboard but I keep getting the following message:

Downloading update from http://ww.wp.xz.cn/wordpress-3.9.1-new-bundled.zip…

Unpacking the update…

Could not create directory.: /usr/local/pem/vhosts/160838/webspace/siteapps/48379/htdocs/wp-content/upgrade/wordpress-3.tmp

Installation Failed

Plugins won’t install or update either.

Any help would be greatly appreciated.