VSS Error 8193, 12291

Hi All,

I am trying to backup a windows server 2012 with BE20.3, but I always get the following error.

1) 12291

Volume Shadow Copy Service error: Error on creating/using the COM+ Writers publisher interface: BackupShutdown [0x80042302, A Volume Shadow Copy Service component encountered an unexpected error.

Check the Application event log for more information.
].

2)8193

Volume Shadow Copy Service error: Unexpected error calling routine IMultiInterfaceEventControl::GetSubscriptions.  hr = 0x80010108, The object invoked has disconnected from its clients.