was unable to create a snapshot of the selected volume 0x186C2

Hello,

I'm novice to this area, after the execution of all the instructions for setting up the backup agent gives an error message: "Microsoft Azure Recovery Services Agent was unable to create a snapshot of the selected volume. Please try the operation again. If the issue persists, contact Microsoft Support(0x186C2)".

So,I experience a problem making a snapshot of selected volume.

Operating System Windows Server 2012 installed on the virtual machine in the cloud, on the server the agent is installed and the file backup is also on this server.

Thanks in advance for your help!

Vyacheslav.