Wait several minutes or disable sleep mode.
Expected behaviour in currect product architecture. Schedule backups on system shutdown.
This is an irregular known issue.
As a workaround, please shut down the Agent machine manually (or through Remote Desktop).
Backup scheduled on the system shutdown has failed.
Check the following system settings on the Agent machine to make sure that there are no factors preventing backup tasks from execution:
1) Open Windows Registry (press Win+R, type regedit and click OK to open) and check the following:
If you want your Windows machine to turn off automatically after completing the backup job, you can set up automatic shutdown using native Windows commands.