Maybe little bit oftop, but anyway
Did somebody say about LED: is it still not so bright like on custom ROMs?
I compared it on ZUI 3.5.243 (don't remember about older versions) - LED works with "poor light" and some custom ROMs (LineAge 14.1, RR 5.8.3) - LED on custom looks much brighter.
One more about LED color during charging is: RED on charge and GREEN only with 100%.
It it possible to fix without addition software to: RED on charge up to 90% and GREEN from 90 to 100%?
What version of TWRP? Did you update it? This normally happens when your data partition is encrypted by the former version of TWRP. Go back to the former version and save your data on any external drive. Update TWRP then and format the data partition. Copy your stuff back on the phone. Or even better, start with tutorial B and start with a clean install!
Putting the file in .zuiota doesn't work. Just tried.
What worked for me (locked bootloader, no root):
simply put the file in / folder (root folder) and rename it to update.zip, restart in recovery and and choose install update.
After few minutes phone updates and everything works fine, even google apps, and I didn't install Google Partner Setup 8.0.0.
Should I install this Google Partner Setup 8.0.0, anyway ??? thanks @theface