Error 0x80420301

Value: -2143157503 | 0x80420301 | 2151809793

What does it mean ?

EAP_E_USER_ROOT_CERT_INVALID  
The authentication failed because the root certificate used for this network is not valid.
Value: 769 | 0x0301 | 0b0000001100000001

Where does it come from ?

FACILITY_EAP  
Extensible Authentication Protocol
Value: 66 | 0x042 | 0b01000010

StackOverflow

Other Errors for FACILITY_EAP