ERROR: No destination correctly defined for backup! Please correct job settings.

My backups have not been working since 19 Jan.

Job named ‘weekly database regular’ on 19 Jan was OK. Job created by me.
Job named ‘weekly database regular AWS’ on 19 Jan has “ERROR: No destination correctly defined for backup! Please correct job settings”. This job seemed to have automatically created itself when I first created the above job 18 mths ago.

Same thing happened again the following week on 26 Jan.

Job named ‘full regular’ on 1 Feb (which is my monthly job) has “WARNING: Job restarts due to inactivity for more than 5 minutes.”
Job named ‘full regular AWS’ on 1 Feb has both errors: “WARNING: Job restarts due to inactivity for more than 5 minutes.” and “ERROR: No destination correctly defined for backup! Please correct job settings.”

I did a manual backup and works fine. I then selected ‘run now’ for all the above jobs from the Jobs list and still wont work.

I’ve not made any changes to the settings. Its always been set up to backup to folder. I set it up with the following checked:
– Database Backup
– File Backup
– Back up to folder
– With WordPress Cron (in the Schedule tab)
These are still showing the same.
I have the current version 3.1.4

Any ideas why this is happening all of a sudden. What do I need to check? Is it going to mess up things to create new jobs again and do I have to delete the previous ones? – I don’t want to lose the backups I have from early Jan.