Error 0x8004A021

Value: -2147180511 | 0x8004A021 | 2147786785

What does it mean ?

NETCFG_E_NOT_INITIALIZED  
Indicates that the INetCfg interface is expected to be initialized, but it is not yet initialized.
Value: 40993 | 0xA021 | 0b1010000000100001
UPNP_E_DUPLICATE_NOT_ALLOWED  
A duplicate element exists.
Value: 40993 | 0xA021 | 0b1010000000100001

Where does it come from ?

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

StackOverflow

Other Errors for FACILITY_ITF