A SureBackup job fails, and the following entries can be seen in the JobSB.SureBackup_name.log:
[timestamp] <09> Error Exception has been thrown by the target of an invocation. (System.Reflection.TargetInvocationException)
[timestamp] <09> Error NfsService: Failed to mount backup, share id 'xxx', host 'hostname'. (System.Exception)
[timestamp] <09> Error Access is denied\nFailed to create event [xxx].\nRPC: Failed MountBackup.\n (Veeam.Backup.Common.CAppException)
This issue occurs when the Proxy server is used as a Backup Repository and Veeam Backup Proxy service is running under the Local System account.
Make sure the Veeam Backup Proxy service* uses the same credentials that both Veeam NFS and Veeam Backup services run under.
* - in v8 the service is named Veeam Data Movers Service