not enough disk space

Acronis Cyber Protect Cloud: Agent auto-update fails with "There is not enough free space for installation or update. The available space must be greater than 5 GB" although disks have more space available

Symptoms

Agent auto-update or remote update fails with the following error: "There is not enough free space for installation or update. The available space must be greater than 5 GB."
However, agent machine has more free space available.

Cause

5 GB of free space is required in the following directories: