Just got the M8. Got S-Off/unlocked bootloader via Sunshine (after trying via firewater for 5 hours before reading that method was patched. Achieved permanent root and flashed TWRP recovery. Made a backup. Wiped. Banged head against wall.
Have tried to flash both GPE and Viper. Have downloaded each twice. Have reflashed TWRP (through ADB and Rom Installer).
Every time I try to flash a rom, it fails. It just hangs for a few seconds then says: error flashing zip '/external_sd/ViperOneM8_1.7.1.zip'.
I can restore my backup through TWRP with no problem. Please help...I am at my wit's end.