Check if you have more than one .jar file in that folder.
Move the older Jar file in other folder and run. it works.
But remember if your version 8.4.x, then the jar file older than 8.4.x should be removed.
in my case, the older jar file was 8.1.1 (e.g.vmlcm-service-8.1.1-SNAPSHOT.jar)