WPMU plugin updates not installing automatically with Easy Updates Manager

The last 2 updates to WPMU plugins have not updated correctly.
Here's the message we're receiving on all of our wesites:
WordPress site: http://www.claytontaylor.org/ (and all other domains we own)
The following plugins were successfully updated:
Updating plugin:
The plugin is at the latest version.
Error: [fs_unavailable] Could not access filesystem.
This is a file permission issue that we previously had with the WordFence security plugin. They were able to find the cause and corrected it.

Can you please assist?
Many thanks.