3 out of 4 remote backups quit working

I have two Ex4 devices and the backups worked up until a few days ago. now 3 of the 4 jobs fail with the following message. I have deleted and readded the backups so it sees the shares fine.  Any suggestions?

backup_failure.png

You should try contacting support about this issue.

http://support.wd.com/contact/contact.asp?lang=en&ct=personalcloud