On my phone, a OnePlus 3 running Marshmallow, I have Titanium Backup configured to run automatic backups twice a week. When it runs, it gets stuck. The notification displays "Skipping 96% - Wi-Fi access points." This notification sticks around until I force quit Titanium Backup or reboot the phone, and I presume that the backup never completes.
Google searches have revealed nothing that appears relevant. Any ideas what's wrong?