Error code -1
Sometime when you restore a backup to your iPad or iPhone with iBackupBot, iBackupBot can pop up a error message window showing “Error occurred, error code: -1”
There are 3 reasons that can cause this problem:
The most likely reason is that you enabled Find My iPhone on your iPad or iPhone.
Disable it then try to restore again, and re-enable after you have restored.
To turn off Find My iPhone, tap
Settings > iCloud
And disable Find My iPhone.
Other reasons include, Your iPad or iPhone is busy.
E.g, you do a restore with iTunes and the restore processing did not completed, then you do a restore with iBackupBot and the error occurred.
Your can try to restore your idevice again if you need to.
If you tried all the above methods and the problem is still not resolved, you can try restoreing your device with iTunes on a different known-good computer.
Also take note that save game files don't work on iOS 10 or 11.
Good luck ?