Cannot flash any rom on 10T Lite

Hi

I unlocked my bootloader today after waiting the 1 week and I wanted to flash ArrowOS 11.
The steps I used were
1. Unlocked bootloader causing the phone to get wiped
2. Moved ArrowOS onto the SD card
3. Rebooted into fastboot mode and flashed TWRP
4. Rebooted into TWRP (now it says there is no OS installed)
5. In TWRP, first I did an advanced wipe and wiped Data, Davlik Cache, Cache, then I flashed ArrowOS and then I formatted data. When doing all these I had errors saying it was unable...

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