Programm crashes when scan ist finished

Hi, im running vers. 2.1.0.r2 on an Asustor NAS and the programm always crashes when scan is finished. As a result of the crash there is no connection to the server and I can't access the library nor the admin page. The only solution is to delete the program, new installation, and stop the scan before it is finished. Then there is no problem and I can access library and admin page.

The version 1.xx is was running before does not cause any problems. Do you have any idea what's wrong. Please see log file:

20171014 22:52:48 [qtp1030684756-282] INFO  com.ubooquity.d.a - Admin cookie token invalid or too old. Access Denied. [ip:192.168.178.3]
20171014 22:53:13 [Thread-3] WARN  o.e.j.util.thread.QueuedThreadPool - qtp1030684756{STOPPING,8<=33<=200,i=0,q=20} Couldn't stop Thread[qtp1030684756-277,5,main]
20171014 22:53:13 [Thread-3] WARN  o.e.j.util.thread.QueuedThreadPool - qtp1030684756{STOPPING,8<=33<=200,i=0,q=20} Couldn't stop Thread[qtp1030684756-259,5,main]
20171014 22:53:13 [Thread-3] WARN  o.e.j.util.thread.QueuedThreadPool - qtp1030684756{STOPPING,8<=33<=200,i=0,q=20} Couldn't stop Thread[qtp1030684756-263,5,main]
20171014 22:53:13 [Thread-3] WARN  o.e.j.util.thread.QueuedThreadPool - qtp1030684756{STOPPING,8<=33<=200,i=0,q=20} Couldn't stop Thread[qtp1030684756-265,5,main]
20171014 22:53:13 [Thread-3] WARN  o.e.j.util.thread.QueuedThreadPool - qtp1030684756{STOPPING,8<=33<=200,i=0,q=20} Couldn't stop Thread[qtp1030684756-276,5,main]
20171014 22:53:13 [Thread-3] WARN  o.e.j.util.thread.QueuedThreadPool - qtp1030684756{STOPPING,8<=33<=200,i=0,q=20} Couldn't stop Thread[qtp1030684756-268,5,main]
20171014 22:53:13 [Thread-3] WARN  o.e.j.util.thread.QueuedThreadPool - qtp1030684756{STOPPING,8<=33<=200,i=0,q=20} Couldn't stop Thread[qtp1030684756-266,5,main]
20171014 22:53:13 [Thread-3] WARN  o.e.j.util.thread.QueuedThreadPool - qtp1030684756{STOPPING,8<=33<=200,i=0,q=20} Couldn't stop Thread[qtp1030684756-267,5,main]
20171014 22:53:13 [Thread-3] WARN  o.e.j.util.thread.QueuedThreadPool - qtp1030684756{STOPPING,8<=33<=200,i=0,q=20} Couldn't stop Thread[qtp1030684756-278,5,main]
20171014 22:53:13 [Thread-3] WARN  o.e.j.util.thread.QueuedThreadPool - qtp1030684756{STOPPING,8<=33<=200,i=0,q=20} Couldn't stop Thread[qtp1030684756-271,5,main]
20171014 22:53:13 [Thread-3] WARN  o.e.j.util.thread.QueuedThreadPool - qtp1030684756{STOPPING,8<=33<=200,i=0,q=20} Couldn't stop Thread[qtp1030684756-262,5,main]
20171014 22:53:13 [Thread-3] WARN  o.e.j.util.thread.QueuedThreadPool - qtp1030684756{STOPPING,8<=33<=200,i=0,q=20} Couldn't stop Thread[qtp1030684756-279,5,main]
20171014 22:53:13 [Thread-3] WARN  o.e.j.util.thread.QueuedThreadPool - qtp1030684756{STOPPING,8<=33<=200,i=0,q=20} Couldn't stop Thread[qtp1030684756-261,5,main]
20171014 22:53:13 [Thread-3] WARN  o.e.j.util.thread.QueuedThreadPool - qtp1030684756{STOPPING,8<=33<=200,i=0,q=20} Couldn't stop Thread[qtp1030684756-272,5,main]
20171014 22:53:13 [Thread-3] WARN  o.e.j.util.thread.QueuedThreadPool - qtp1030684756{STOPPING,8<=33<=200,i=0,q=20} Couldn't stop Thread[qtp1030684756-273,5,main]
20171014 22:53:13 [Thread-3] WARN  o.e.j.util.thread.QueuedThreadPool - qtp1030684756{STOPPING,8<=33<=200,i=0,q=20} Couldn't stop Thread[qtp1030684756-274,5,main]
20171014 22:53:13 [Thread-3] WARN  o.e.j.util.thread.QueuedThreadPool - qtp1030684756{STOPPING,8<=33<=200,i=0,q=20} Couldn't stop Thread[qtp1030684756-270,5,main]
20171014 22:53:13 [Thread-3] WARN  o.e.j.util.thread.QueuedThreadPool - qtp1030684756{STOPPING,8<=33<=200,i=0,q=20} Couldn't stop Thread[qtp1030684756-269,5,main]
20171014 22:53:13 [Thread-3] WARN  o.e.j.util.thread.QueuedThreadPool - qtp1030684756{STOPPING,8<=33<=200,i=0,q=20} Couldn't stop Thread[qtp1030684756-275,5,main]
20171014 22:53:13 [Thread-3] WARN  o.e.j.util.thread.QueuedThreadPool - qtp1030684756{STOPPING,8<=33<=200,i=0,q=20} Couldn't stop Thread[qtp1030684756-167,5,main]
20171014 22:53:13 [Thread-2] INFO  com.ubooquity.b - Internal server stopped
20171014 22:53:13 [Thread-2] INFO  com.ubooquity.Ubooquity - Ubooquity has closed.

The current IP (fix) is 192.168.178.10. not 192.168.178.3