Any Solution Root device Bootloader Unlocked: NO
can install twrp recovery ?
Previous Device Xperia Z5 E6653 was Bootloader Unlocked Allowed: Yes,... i installed firmware zip through TWRP
that firmware also shows configuration message
Bootloader Unlocked Allowed: NO
but bootloader was unlocked and Twrp recovery also had working,,,
You can root it with kingroot. See https://rootmydevice...sony-xperia-z5/ But this software plants (maybe) unwanted program in your phone, so you can replace it to supersu, after you rooted it. After you rooted your phone with kingroot, you can install supersu and "system app remover", so at first you should disable kingroot in your device to confirm supersu is working, then remove kingroot with "system app remover." Then your phone looks like rooted with supersu. You can do it w/o twrp recovery.