If it's the original kindle fire
TWRP may not have installed correctly could try flashing Twrp manually
Download
adb/fastboot.exe files, and
openrecovery-twrp-2.2.2.1-blaze.img
verify md5 e6183f4c6043f2c6a0d519d9f660ee98 for TWRP see
https://sites.google.com/site/sdshadowscollection/home/hash-checksums
Create a folder in c drive named adb,
unzip/extract files,
copy AdbWinUsbApi.dll, AdbWinApi.dll, adb.exe, fastboot.exe, openrecovery-twrp-2.2.2.1-blaze.img to adb folder.
do not have kindle connected yet.
open command prompt (start>all programs >accessories>command prompt)
in command prompt>change directory to adb
then
Code:
fastboot flash recovery openrecovery-twrp-2.2.2.1-blaze.img
fastboot reboot
command prompt should say
waiting for device
with kindle off, connect to pc via usb
when bootloader starts, commands should execute and kindle should reboot again
select reboot to recovery option
retry TWRP if still does not work try
try in command prompt with bootloader like last commands
Code:
fastboot oem format
fastboot reboot
try TWRP again
another option is the
Kindle Fire Unbrick Utility V1.1