Cannot open last_backups.xml error

Hello,

I am using the latest (Build 10.0.13762) ABR 10 Advanced Workstation. One of my users always gets a warning in the logs during the daily backup. The log indicates "Cannot open 'last_backups.xml' on the incremental backups. The backup indicates that it has succeeded with warnings. And the vault shows the backed up file for the day. So, the backup itself seems fine.

I have uninstalled the ABR Windows agent and reinstalled the agent again but I still get this "Cannot open last_backups.xml" warning every day on this PC.

Has anyone seen this error message before? If so, how can I get rid of this warning?

Thank you very much for your help.