Having problem updating release keys?

Hi,i've been having update problems last 2 days and im confused.Every time i click restart & install button in update section it brings phone to recovery and starts installing update,but suddenly it requires phone to have root access.Is there any way to fix that without rooting? Because rooting caused me problem last time(infinite bootloop).
Also,im interested if my phone really is GPe.Here is the getvar:
(bootloader) version: 0.5
(bootloader) version-bootloader: 3.19.0.0000
(bootloader) version-baseband: 1.23.213311491.A13G
(bootloader) version-cpld: None
(bootloader) version-microp: None
(bootloader) version-main: 5.07.1700.12
(bootloader) version-misc: PVT SHIP S-OFF
(bootloader) serialno: FA44WWM02473
(bootloader) imei: 352628061078442
(bootloader) imei2: Not Support
(bootloader) meid: 00000000000000
(bootloader) product: m8_ul
(bootloader) platform: hTCBmsm8974
(bootloader) modelid: 0P6B13000
(bootloader) cidnum: GOOGL001
(bootloader) battery-status: good
(bootloader) battery-voltage: 0mV
(bootloader) partition-layout: Generic
(bootloader) security: off
(bootloader) build-mode: SHIP
(bootloader) boot-mode: FASTBOOT
(bootloader) commitno-bootloader: 11459804
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0
Thanks

from xda-developers http://ift.tt/2cCpgHO
via IFTTT