Error 0xC1210100

Value: -1054801664 | 0xC1210100 | 3240165632

What does it mean ?

WDSMCS_E_SESSION_SHUTDOWN_IN_PROGRESS  
The request for content was rejected because shutdown is in progress for specified session.
Value: 256 | 0x0100 | 0b0000000100000000

Where does it come from ?

FACILITY_DEPLOYMENT_SERVICES_MULTICAST_SERVER  
Windows Deployment Services (WDS) Multicast Server
Value: 289 | 0x121 | 0b100100001

StackOverflow

Other Errors for FACILITY_DEPLOYMENT_SERVICES_MULTICAST_SERVER