Microsoft Azure Backup failed to access the shadow copy because of inadequate disk space on the volu

Hi

I have same issue while backing up. FYI i have already excluded following files from antivirus

C:\Program Files\Microsoft Azure Recovery Services Agent\bin\cbengine.exe

C:\Program Files\Microsoft Azure Recovery Services Agent\scratch\*

And I have almost 1.3 TB available space in my c drive.

Please advise

Bilal