Error 0x80310015

Value: -2144272363 | 0x80310015 | 2150694933

What does it mean ?

FVE_E_NOT_SUPPORTED  
This drive cannot be encrypted.
Value: 21 | 0x0015 | 0b0000000000010101

Where does it come from ?

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

Other Errors for FACILITY_FVE