We configured SQL DB snapshot backups through Networker, the backup was running fine upto last week and this week get below listed error on eventvwr but still the backups were already went fine.

NMM .. Error generating files and directories list for the backup

64036:nsrsnap_vss_save:NMM.. Error preparing list of files for backup: Error generating files and directives list for the backup.

63372:nsrsnap_vss_save:NMM.. Registration of snapshot set failed - -Error generating files and directives list for the backup

77175:nsrsnap_vss_save:NMM.. Completed commit replica with status of false.

Automatic mounting of new volumes enabled.

37959:nsrsnap_vss_save:An internal error occurred.

.

internal error - VSS error

Our Networker configuration details,

Networker and NMM are configured with 8.2.3 version