Construction of filelist failed

I’m using Urbackup server 2.0.36 on a Ubuntu server. I’ve also a Ubuntu linux client with urbackup 2.0.34.

When the client try to build the filelist it fails but I am not able to figure out why.

These few logs:

2016-11-24 12:47:02: urbackupserver: Server started up successfully!
2016-11-24 12:47:02: Started UrBackupClient Backend...
2016-11-24 12:47:02: FileSrv: Server started up successfully
2016-11-24 12:47:03: Looking for old Sessions... 0 sessions
2016-11-24 12:47:05: Started connection to SERVICE_COMMANDS
2016-11-24 12:47:05: ClientService cmd: #ILKXUT0h3qfHi1o1XBQUF#1CHANNEL capa=6617&token=MplRjUbPxx5QCpE9ky4Z&restore_version=1
2016-11-24 12:47:15: Client timeout in ClientConnector::Run
2016-11-24 12:47:15: SERVICE_COMMANDS finished
2016-11-24 12:47:15: Started connection to SERVICE_COMMANDS
2016-11-24 12:47:15: ClientService cmd: #ILKXUT0h3qfHi1o1XBQUF#2PING RUNNING pc_done=&status_id=591&speed_bpms=0&total_bytes=-1&done_bytes=0#token=MplRjUbPxx5QCpE9ky4Z
2016-11-24 12:47:15: Started connection to SERVICE_COMMANDS
2016-11-24 12:47:15: ClientService cmd: #ILKXUT0h3qfHi1o1XBQUF#3START FULL BACKUP group=0&running_jobs=1&sha=528&with_permissions=1&with_scripts=1&with_orig_path=1&with_sequence=1&with_proper_symlinks=1&status_id=591#token=MplRjUbPxx5QCpE9ky4Z
2016-11-24 12:47:16: Started connection to SERVICE_COMMANDS
2016-11-24 12:47:16: ClientService cmd: #ILKXUT0h3qfHi1o1XBQUF#GET VSSLOG
2016-11-24 12:47:16: rc=0 hasError=true state=0
2016-11-24 12:47:16: SERVICE_COMMANDS finished
2016-11-24 12:47:16: rc=0 hasError=true state=0
2016-11-24 12:47:16: SERVICE_COMMANDS finished
2016-11-24 12:47:16: Started connection to SERVICE_COMMANDS
2016-11-24 12:47:16: ClientService cmd: #ILKXUT0h3qfHi1o1XBQUF#1CHANNEL capa=6617&token=MplRjUbPxx5QCpE9ky4Z&restore_version=1
2016-11-24 12:47:25: rc=0 hasError=true state=0
2016-11-24 12:47:25: SERVICE_COMMANDS finished
2016-11-24 12:47:26: Client timeout in ClientConnector::Run
2016-11-24 12:47:26: SERVICE_COMMANDS finished
2016-11-24 12:47:26: Started connection to SERVICE_COMMANDS
2016-11-24 12:47:26: ClientService cmd: #ILKXUT0h3qfHi1o1XBQUF#2LOGDATA 1479987809 0-1479987759-Starting incremental file backup...
2-1479987801-Constructing of filelist of "bluenergy" failed - TIMEOUT(1)
2-1479987809-Backup had an early error. Deleting partial backup.

2016-11-24 12:47:26: rc=0 hasError=true state=0
2016-11-24 12:47:26: SERVICE_COMMANDS finished
2016-11-24 12:47:26: Started connection to SERVICE_COMMANDS
2016-11-24 12:47:26: ClientService cmd: #ILKXUT0h3qfHi1o1XBQUF#2LOGDATA 1479987885 0-1479987875-Starting full file backup...
2-1479987875-Constructing of filelist of "bluenergy" failed: ERR
2-1479987885-Backup had an early error. Deleting partial backup.

2016-11-24 12:47:26: rc=0 hasError=true state=0
2016-11-24 12:47:26: SERVICE_COMMANDS finished
2016-11-24 12:47:26: Started connection to SERVICE_COMMANDS
2016-11-24 12:47:26: ClientService cmd: #ILKXUT0h3qfHi1o1XBQUF#2LOGDATA 1479988052 0-1479988042-Starting incremental file backup...
2-1479988042-Constructing of filelist of "bluenergy" failed: ERR
2-1479988052-Backup had an early error. Deleting partial backup.

2016-11-24 12:47:26: rc=0 hasError=true state=0
2016-11-24 12:47:26: SERVICE_COMMANDS finished
2016-11-24 12:47:27: Started connection to SERVICE_COMMANDS
2016-11-24 12:47:27: ClientService cmd: #ILKXUT0h3qfHi1o1XBQUF#2LOGDATA 1479988105 0-1479988095-Starting full file backup...
2-1479988095-Constructing of filelist of "bluenergy" failed: ERR
2-1479988105-Backup had an early error. Deleting partial backup.

2016-11-24 12:47:27: rc=0 hasError=true state=0
2016-11-24 12:47:27: SERVICE_COMMANDS finished
2016-11-24 12:47:27: Started connection to SERVICE_COMMANDS
2016-11-24 12:47:27: ClientService cmd: #ILKXUT0h3qfHi1o1XBQUF#1CHANNEL capa=6617&token=MplRjUbPxx5QCpE9ky4Z&restore_version=1
2016-11-24 12:47:37: Client timeout in ClientConnector::Run
2016-11-24 12:47:37: SERVICE_COMMANDS finished
2016-11-24 12:47:38: Started connection to SERVICE_COMMANDS
2016-11-24 12:47:38: ClientService cmd: #ILKXUT0h3qfHi1o1XBQUF#1CHANNEL capa=6617&token=MplRjUbPxx5QCpE9ky4Z&restore_version=1
2016-11-24 12:47:48: Client timeout in ClientConnector::Run
2016-11-24 12:47:48: SERVICE_COMMANDS finished
2016-11-24 12:47:49: Started connection to SERVICE_COMMANDS
2016-11-24 12:47:49: ClientService cmd: #ILKXUT0h3qfHi1o1XBQUF#1CHANNEL capa=6617&token=MplRjUbPxx5QCpE9ky4Z&restore_version=1
2016-11-24 12:47:59: Client timeout in ClientConnector::Run
2016-11-24 12:47:59: SERVICE_COMMANDS finished
2016-11-24 12:48:00: Started connection to SERVICE_COMMANDS
2016-11-24 12:48:00: ClientService cmd: #ILKXUT0h3qfHi1o1XBQUF#1CHANNEL capa=6617&token=MplRjUbPxx5QCpE9ky4Z&restore_version=1

Do you have some suggestion about how solve this problem?

Thanks