[Plugin: BackWPup] WP-Cron issues

I just logged in to my Multi-site install and BackWPup is saying that cron is no longer working on the site so my scheduled back ups are not running. It’s providing the message below.

BackWPup:
– WP-Cron isn’t working, please check it!

Possibly Related post:
http://wordpress.org/support/topic/plugin-backwpup-wp-cron-issue-nightly-backup-not-triggering?replies=1

http://wordpress.org/extend/plugins/backwpup/