there are hints in the howto… without any details we cant help… perhaps you have this issue, I dont know.
I can't relieve you of reading the howto
TWRP update shows ERROR: 1 / can not mount system ...
- this error can occur if you try the update with updater app or if you started TWRP manually
-> while you are in TWRP reboot your device in recovery mode
-> try to install the rom again
-> if it will fail, reboot in recovery again
-> or use "fastboot boot twrp.img" again
-> sometimes you need more then one try
-> if it will not work choose another twrp version
Good afternoon and Thanks for the help... I've tried twice and I couldn't.. and I've lost some data.. the time and patience is not much..
If I do with the update with Xiaomitool v2, I will be successful and this room 13 appears to install successfully?!