Error 0x802A0008

Value: -2144731128 | 0x802A0008 | 2150236168

What does it mean ?

UI_E_BOOLEAN_EXPECTED  
A callback returned a success code other than S_OK or S_FALSE.
Value: 8 | 0x0008 | 0b0000000000001000

Where does it come from ?

FACILITY_UI  
User Interface
Value: 42 | 0x02A | 0b00101010

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