Error 0x8031003C

Value: -2144272324 | 0x8031003C | 2150694972

What does it mean ?

FVE_E_KEYFILE_NOT_FOUND  
The BitLocker startup key or recovery password cannot be found on the USB device. Verify that you have the correct USB device, that the USB device is plugged into the computer on an active USB port, restart the computer, and then try again. If the problem persists, contact the computer manufacturer for BIOS upgrade instructions.
Value: 60 | 0x003C | 0b0000000000111100

Where does it come from ?

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

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