Hi,
You can try checking the status of vssadmin list writers for shadow copy optimization writer on your server.
on your client - open CMD - vssadmin list writers.
you should get an output like below as "NO ERROR'. if not check with your OS team to fix this. Hope this will help.
Writer name: 'Shadow Copy Optimization Writer'
Writer Id: {xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx}
Writer Instance Id: {xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx}
State: [1] Stable
Last error: No error
