Error 0x80501106

Value: -2142236410 | 0x80501106 | 2152730886

What does it mean ?

MP_ERROR_CODE_BAD_REGEXP  
Value: 4358 | 0x1106 | 0b0001000100000110

Where does it come from ?

FACILITY_WINDOWS_DEFENDER  
Windows Defender
Value: 80 | 0x050 | 0b01010000

Other Errors for FACILITY_WINDOWS_DEFENDER