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
