Error 0x80042812

Value: -2147211246 | 0x80042812 | 2147756050

What does it mean ?

The volume could not be shrunk because it is locked by BitLocker. Unlock the volume and try again.
Value: 10258 | 0x2812 | 0b0010100000010010

Where does it come from ?

COM/OLE Interface management. FACILITY_ITF is designated for user-defined error codes returned from interface methods
Value: 4 | 0x004 | 0b00000100

Other Errors for FACILITY_ITF