1. Thanks EuseBoss for having the courage to play with that firmware on your device.
2. Excuse me for not writing in spanish, but it's not a language that i know. (Google Translate is my friend)
3. Stop flashing the recovery of V55.
I'm using the last TWRP released by joe.stone on xda and the only thing i've made to flash this firmware on my device was to edit the install script (inside the zip, \META-INF\com\google\android\updater-script, change v55 to v71a). The recovery will think that this is a v71a firmware.
Good luck! And thanks again.