ERROR: Error getting SID of ACE entry of file

Hello,

I am using Client 2.0.29 under Windows 10 and Server 2.0.30 under debian jessie.
A Backup is running fine on another machine (also W10).
But on one machine I do not get any backups.
On the Server I did get a log yesterday, but at that time I had a permission problem in the backup-dir of the Server:

Fehler
30.07.16 23:22
Error creating file for writing MBR data. Permission denied (code: 13)
Fehler
30.07.16 23:22
Backup failed

Today, after fixing the permissions issue, I get:

Fehler
31.07.16 21:07
Connecting to ClientService of “LaptopHendrik” failed - CONNECT error during filelist construction
Fehler
31.07.16 21:07
Backup had an early error. Deleting partial backup.

So, these logs were from the Server.
On the client, I get this debug-log:

2016-07-31 16:56:09: ERROR: Error getting SID of ACE entry of file “\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy11\Windows\debug”
2016-07-31 18:12:07: ERROR: Recvfrom error in CUDPThread::UdpStep
2016-07-31 18:12:07: ERROR: Last error: 10058
2016-07-31 21:16:03: ERROR: Recvfrom error in CUDPThread::UdpStep
2016-07-31 21:16:03: ERROR: Last error: 0

How can I further debug this?

Regards,
Hendrik

Could be just a connection issue… that is does it work when retrying? Could also be a firewall problem if it never works.