This is logs file
2018-12-25 16:00:19 INFO: Operating system name: Windows Server 2008 R2 version: 6.1 architecture: amd64
2018-12-25 16:00:19 INFO: Java runtime name: Java HotSpot(TM) 64-Bit Server VM vendor: Oracle Corporation version: 25.191-b12
2018-12-25 16:00:19 INFO: Memory limit heap: 455mb non-heap: 0mb
2018-12-25 16:00:19 INFO: Character encoding: UTF-8 charset: UTF-8
2018-12-25 16:00:19 INFO: Version: 4.0-SNAPSHOT
2018-12-25 16:00:26 INFO: Starting server...
2018-12-25 16:00:26 INFO: [4b0cfb2e] connected
2018-12-25 16:00:26 INFO: [22c34ba2] connected
...
2018-12-25 16:10:20 INFO: [2da57721] connected
2018-12-25 16:10:20 INFO: [6c2c1713] connected
2018-12-25 16:10:20 INFO: [eac5fb76] connected
2018-12-25 16:10:20 INFO: [76defa1f] connected
2018-12-25 16:19:22 INFO: user: 1, action: login
You should follow troubleshooting guide.
I'm already setup Traccar 4.0 and server running ok. But device cannot connect to server.