Error 0x803100A7

Value: -2144272217 | 0x803100A7 | 2150695079

What does it mean ?

FVE_E_KEY_LENGTH_NOT_SUPPORTED_BY_EDRIVE  
The required authentication key length is not supported by the drive.
Value: 167 | 0x00A7 | 0b0000000010100111

Where does it come from ?

FACILITY_FVE  
Full volume encryption
Value: 49 | 0x031 | 0b00110001

StackOverflow

Other Errors for FACILITY_FVE