Cannot install Dashboard Update

I am trying to install the latest Dashboard update. This is the message I get.

Downloading install package from https://premium.wpmudev.org/wdp-un.php?action=install_wpmudev_dash…

Unpacking the package…

Installing the plugin…

Destination folder already exists. /services4/webpages/util/g/a/gavin.site.aplus.net/caledonsecurity.com/public/wp-content/plugins/wpmudev-updates/

Plugin install failed. Now I have no dashboard at all. I need to fix this ASAP.