VSS error on VADP backup

I have several windows 2008 R2 clients that show up as failed whenever a full backup runs but shows up as successful when an incremental is completed. I checked the media savesets and it shows the full backup....

Here is the following message shown:

7285:save: Volumes selected do not support the use of VSS. NetWorker software will save the files using the legacy backup method. No snapshot will be taken.
7281:save: VSS snapshot failed with error 0x80071126 -- The file or directory is not a reparse point.
.
7284:save: Networker will save the files without the snapshot.
6681:save: Could not stat /\: No such file or directory

Is there a reason why this would result in as completed successfully for incremental and failed for full backups?