Error 0x80310064

Value: -2144272284 | 0x80310064 | 2150695012

What does it mean ?

FVE_E_POLICY_STARTUP_PIN_KEY_NOT_ALLOWED  
Group Policy settings do not permit the use of a startup key and PIN. Please choose a different BitLocker startup option.
Value: 100 | 0x0064 | 0b0000000001100100

Where does it come from ?

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

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