Client (linux) does not find Server (Windows)

Hello,

I re-installed the Urbackup-Server on my Windows Machine.
Now the Server does not find the client.
The Debug-Log is also not very verbose:

2016-08-27 11:43:38: ClientService cmd: STATUS DETAIL#pw=5gI6vxuQh1U4holFiUtRtXsitUuhMf
2016-08-27 11:43:38: rc=0 hasError=true state=0
2016-08-27 11:43:38: ClientService cmd: START BACKUP INCR#pw=5gI6vxuQh1U4holFiUtRtXsitUuhMf
2016-08-27 11:43:38: rc=0 hasError=true state=0
2016-08-27 11:45:48: ClientService cmd: STATUS DETAIL#pw=5gI6vxuQh1U4holFiUtRtXsitUuhMf
2016-08-27 11:45:48: rc=0 hasError=true state=0
2016-08-27 11:45:48: ClientService cmd: START BACKUP INCR#pw=5gI6vxuQh1U4holFiUtRtXsitUuhMf
2016-08-27 11:45:48: rc=0 hasError=true state=0
2016-08-27 11:45:53: ClientService cmd: #IYmzlxHGZBrYerRPnDjdJ#ADD IDENTITY
2016-08-27 11:45:53: rc=0 hasError=true state=0

How can I find the problem?

Greetings,
Hendrik

Have a look at this FAQ entry: https://www.urbackup.org/faq.html#ident_err