FIX
Hi, I was having the same problem, NOTHING was working, ADB Sideload failing, etc. and the OTG cable arrives tomorrow...my way to fix it?
1.- Went to TWRP Recovery
2.- Wipe>Advance Wipe> Wiped everything
3.- Format Data (option next to Advance Wipe)
4.- Reboot into Recovery(during reboot...