Omnifocus Backup Error

I continually receive this error message: "Unable to set attributes on “file:///Users/knarf/Library/Containers/com.omnigroup.OmniFocus2/Data/Library/Application%20Support/OmniFocus/Backups/OmniFocus%202015-06-21%20161823.ofocus-backup/”

I have Omnifocus 2.2 on OS X 10.10.3

Any help on stopping this would be appreciated.

I’m sorry for the trouble! That’s certainly an unusual error. It may indicate some problem with the permissions around your OmniFocus backup location. Would you mind sending in an email to our support team? They’ll be able to dig into your particular OmniFocus setup and backup structure to get you sorted out again.