So I got the same issue after trying to install 12.2.7 on my Mi10: Device just started into fastboot.
Here is my solution (device was already in fastboot because of the issue):
- Download new TWRP version (Download) on PC
- unzip it
- open cmd prompt
- open the unzipped folder
- type in
Code:
fastboot flash recovery recovery.img
- type in
Code:
fastboot boot recovery.img
To set the language:
- third icon from above in the right row
- 4 tabs, the last one on the right is language tab
Now you can flash the update zip via TWRP if you didn´t set a lockscreen. If you had, just reboot to system. Because of the new TWRP it is working again.
You have two options:
- Install the update via the updater app
- delete lockscreen - start in recovery - install update