this is how i updated mine
upgrade 17.1 unofficial
put into fastboot, command(or Power+VDown):
plug in usb
sudo fastboot boot twrp-3.3.0-2-tissot.img
-- System parition
It's your mistake. Never erase "vendor" section.
But in the directions to Treble your phone it says you have to wipe the vendor section
In this thread(Step 10):
i ended up getting this case, it was a good case for travelling as i have almost 200 apps and my battery only last 1 day,
i only used it for travelling, so i put it on and off alot, i should of been more careful and the mini usb snapped off, ...
yes, it's called
i used twrp-3.3.0-2-tissot.img
i found it in this thread:
i can upload it here if you want, but im not sure what website to use to upload because ...