License check failed

2019-05-10 07:40:52  INFO: Starting server...
2019-05-10 07:40:53  WARN: License check failed
2019-05-10 07:41:34  INFO: Logging initialized @669ms to org.eclipse.jetty.util.log.Slf4jLog
2019-05-10 07:41:34  WARN: Unable to load notificator class for
2019-05-10 07:41:35  INFO: Starting server...
2019-05-10 07:41:36  WARN: License check failed
2019-05-10 07:45:42  INFO: Logging initialized @673ms to org.eclipse.jetty.util.log.Slf4jLog
2019-05-10 07:45:42  WARN: Unable to load notificator class for
2019-05-10 07:45:42  INFO: Starting server...
2019-05-10 07:45:43  WARN: License check failed

any one can help me

You are not using official version of Traccar. We don't have any license checks.

Are there other versions of traccar?

could you solve the problem? I also get License verification failed