Error 0x803E012B

Value: -2143420117 | 0x803E012B | 2151547179

What does it mean ?

WPN_E_INVALID_HTTP_STATUS_CODE  
The notification platform has received invalid HTTP status code other than 2xx for polling.
Value: 299 | 0x012B | 0b0000000100101011

Where does it come from ?

FACILITY_WPN  
Notification Platform
Value: 62 | 0x03E | 0b00111110

Other Errors for FACILITY_WPN