please let me know what twrp did you install? (for Redmi 6 pro)
i install twrp.img (3.2.3) but not yet
(target reported max download size of 534773760 bytes
sending 'recovery' (13028 KB)...
OKAY [ 0.315s]
writing 'recovery'...
FAILED (remote: rollback version downgrade)
finished. total time...