Full Server Backup Completed with Exceptions

Hi Support,

I would like to know or clarify regarding my exceptions logs based on my full server backup. I've already find it in the google but I'm still confusing. I know that is not an error or major problem to my backup. Please see the details below:

" Backup- ITGFS00.ad.itechgaming.com - AOFO: Initialization failure on: "\\ITGFS00.ad.itechgaming.com\E:". Advanced Open File Option used: Microsoft Volume Shadow Copy Service (VSS).

V-79-10000-11230 - VSS Snapshot error. Unable to get minimum quiet time for physical volumes. Reduce the activity on these volumes, or wait and run the backup when there is less activity on the volumes."

Please advice as soon as possible!

Thank you and Best Regards,
Gab