Closed Encryption unsuccessfull

MyPhone a919i Duo "Encryption Unsuccessfull"
How can i fix it? I already trying to fix it through flash tool and i followed the instructions but, its not working.. I mean, the flash tool is working but, i stuck in this situation. What should i do? Please help! Thanks! More power phcorner!

Bago mo iflash po yan. Make sure nakaplug yung phone mo sa usb cable from pc to phone then maghahanap/magiinstall ng driver ni phone mo. Wait mo hanggang magsuccessful at madetect sa pc ang phone mo. And tanggalin mo sa pagkakasaksak sa micro usb si phone mo, then tick download sa sp flash tool at dun mo lang isaksak ulit ang phone mo. Wait mo hanggang madetect sya at matapos ang flashing. After nun. Go to recovery mode ng phone, factory reset mo and finally reboot it.

Sana makatulong.