Error 0x8031004F

Value: -2144272305 | 0x8031004F | 2150694991

What does it mean ?

FVE_E_DEBUGGER_ENABLED  
Drive encryption cannot occur while boot debugging is enabled. Use the bcdedit command-line tool to turn off boot debugging.
Value: 79 | 0x004F | 0b0000000001001111

Where does it come from ?

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

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