LINUX - After upgrading traccar I can start it only manually with jar command, starting service is not working

Hello, I upgraded traccar following instructions on your website, after uninstalling i did automatic installing.
After upgrading, restarting server I can start traccar by sudo jre/bin/java -jar tracker-server.jar conf/traccar.xml only
When I try sudo systemctl start traccar.service nothing happens, log will stay empty.

Does anyone knows how to fix this or how to find at least some error message.

Thanks!

Check systemd logs.