I use the @Adam77Root's twrp 18.104.22.168 and everything worked fine .I would take a backup from cm 11 nightly today but I got an error. It failed to take a System backup.
Any ideas to fix it.
Here the log : https://www.dropbox.com/s/gbul6l7yy7nzgqg/recovery.log
Sent from my LG-P880 using XDA Premium 4 mobile app