Step 1 - don't use a way old TWRP with known issues, get up to date -
https://dl.twrp.me/m8/twrp-2.8.7.0-m8.img.html
If you need help getting that installed properly PLEASE stop and say.
It's already obvious that those youtubes were not your best friend.
Step 2 - never expect good help on an HTC without going into the bootloader and saying everything it says from the top line down to and including the date. That's the deal, always, for minimum info required.
Please stop and give that info.
Step 3 - if on a carrier branded phone, please say which one.
Step 4 - always a terrible idea to keep trying stuff without knowing the cause of the first problem - things have a way of getting worse that way.
Step 5 - know that with s-off you are now empowered to convert your phone into a paperweight with one wrong move. See Step 4.
And for
@mikedt - there's no epidemic. There are people who probably discovered through Google that our site is the place to get things fixed on an HTC M8. Sorry your HTC M8 panic didn't work out, maybe next time!
No seriously - there's the worthless old tools still being used for root, and a lot of crappy rooting guides out there, so trouble is expected.
No big deal.
