Nonstop backup is stopped and won't start again.

I tried to set up a nonstop backup for my system partition and boot partition. I put the backup D:\ in another hard disk inside my laptop. It worked fine for the first 1 hours. Maybe after 10 versions the backup stopped itself said [Nonstop backup is stopped]. I tried reboot my system or click start but didn't work. The backup took about 70GB of 140GB free space on D:\. And my system wasn't overloaded. I tried fix 2015 or uninstall it and install 2016 ver. but didn't help either. I deleted the whole backup and set up a new one but met the same problem. What should I do to fix it?

https://www.dropbox.com/s/hz1yzcphp1r1r3i/AcronisSystemReport_20151016_…
And here is the Acronis System Report. Hope it will be helpful.

Thanks for your help.