Error 0x8031009C

Value: -2144272228 | 0x8031009C | 2150695068

What does it mean ?

FVE_E_EFI_ONLY  
The feature is only supported on EFI systems.
Value: 156 | 0x009C | 0b0000000010011100

Where does it come from ?

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

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